Reformat the changelogv0.22.0-rc2

This should provide a easier way to see what kinds of changes we have,
and a single place to look at the breaking changes.

1 files changed, 158 insertions, 146 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c3ad4480..e9fa64c14 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,217 +4,229 @@ v0.22 + 1
 v0.22
 ------
 
-* File unlocks are atomic again via rename. Read-only files on Windows are
-  made read-write if necessary.
-
-* Share open packfiles across repositories to share descriptors and mmaps.
-
-* Use a map for the treebuilder, making insertion O(1)
+### Changes or improvements
 
-* Introduce reference transactions, which allow multiple references to
-  be locked at the same time and updates be queued. This also allows
-  us to safely update a reflog with arbitrary contents, as we need to
-  do for stash.
+* `git_signature_new()` now requires a non-empty email address.
 
-* The index' tree cache is now filled upon read-tree and write-tree
-  and the cache is written to disk.
-
-* LF -> CRLF filter refuses to handle mixed-EOL files
+* Use CommonCrypto libraries for SHA-1 calculation on Mac OS X.
 
-* LF -> CRLF filter now runs when * text = auto (with Git for Windows 1.9.4)
+* Disable SSL compression and SSLv2 and SSLv3 ciphers in favor of TLSv1
+  in OpenSSL.
 
-* The git_transport structure definition has moved into the sys/transport.h
-  file.
+* The fetch behavior of remotes with autotag set to `GIT_REMOTE_DOWNLOAD_TAGS_ALL`
+  has been changed to match git 1.9.0 and later. In this mode, libgit2 now
+  fetches all tags in addition to whatever else needs to be fetched.
 
-* The ssh transport supports asking the remote host for accepted
-  credential types as well as multiple challeges using a single
-  connection. This requires to know which username you want to connect
-  as, so this introduces the USERNAME credential type which the ssh
-  transport will use to ask for the username.
+* `git_checkout()` now handles case-changing renames correctly on
+  case-insensitive filesystems; for example renaming "readme" to "README".
 
-* The build system now accepts an option EMBED_SSH_PATH which when set
-  tells it to include a copy of libssh2 at the given location. This is
-  enabled for MSVC.
+* The search for libssh2 is now done via pkg-config instead of a
+  custom search of a few directories.
 
-* libgit2 no longer automatically sets the OpenSSL locking
-  functions. This is not something which we can know to do. A
-  last-resort convenience function is provided in sys/openssl.h,
-  git_openssl_set_locking() which can be used to set the locking.
+* Add support for core.protectHFS and core.protectNTFS. Add more
+  validation for filenames which we write such as references.
 
-* The git_transport_register function no longer takes a priority and takes
-  a URL scheme name (eg "http") instead of a prefix like "http://"
+* The local transport now generates textual progress output like
+  git-upload-pack does ("counting objects").
 
-* The git_remote_set_transport function now sets a transport factory function,
-  rather than a pre-existing transport instance.
+* `git_checkout_index()` can now check out an in-memory index that is not
+  necessarily the repository's index, so you may check out an index
+  that was produced by git_merge and friends while retaining the cached
+  information.
 
-* A factory function for ssh has been added which allows to change the
-  path of the programs to execute for receive-pack and upload-pack on
-  the server, git_transport_ssh_with_paths.
+* Remove the default timeout for receiving / sending data over HTTP using
+  the WinHTTP transport layer.
 
-* git_remote_rename() now takes the repository and the remote's
-  current name. Accepting a remote indicates we want to change it,
-  which we only did partially. It is much clearer if we accept a name
-  and no loaded objects are changed.
+* Add SPNEGO (Kerberos) authentication using GSSAPI on Unix systems.
 
-* git_remote_delete() now accepts the repository and the remote's name
-  instead of a loaded remote.
+* Provide built-in objects for the empty blob (e69de29) and empty
+  tree (4b825dc) objects.
 
-* git_remote_supported_url() and git_remote_is_valid_url() have been
-  removed as they have become essentially useless with rsync-style ssh paths.
+* The index' tree cache is now filled upon read-tree and write-tree
+  and the cache is written to disk.
 
-* The git_clone_options struct no longer provides the ignore_cert_errors or
-  remote_name members for remote customization.
+* LF -> CRLF filter refuses to handle mixed-EOL files
 
-  Instead, the git_clone_options struct has two new members, remote_cb and
-  remote_cb_payload, which allow the caller to completely override the remote
-  creation process. If needed, the caller can use this callback to give their
-  remote a name other than the default (origin) or disable cert checking.
+* LF -> CRLF filter now runs when * text = auto (with Git for Windows 1.9.4)
 
-  The remote_callbacks member has been preserved for convenience, although it
-  is not used when a remote creation callback is supplied.
+* File unlocks are atomic again via rename. Read-only files on Windows are
+  made read-write if necessary.
 
-* The git_clone_options struct now provides repository_cb and
-  repository_cb_payload to allow the user to create a repository with
-  custom options.
+* Share open packfiles across repositories to share descriptors and mmaps.
 
-* The option to ignore certificate errors via git_remote_cert_check()
-  is no longer present. Instead, git_remote_callbacks has gained a new
-  entry which lets the user perform their own certificate checks.
+* Use a map for the treebuilder, making insertion O(1)
 
-* git_clone_into and git_clone_local_into have been removed from the
-  public API in favour of git_clone callbacks
+* The build system now accepts an option EMBED_SSH_PATH which when set
+  tells it to include a copy of libssh2 at the given location. This is
+  enabled for MSVC.
 
 * Add support for refspecs with the asterisk in the middle of a
   pattern.
 
 * Fetching now performs opportunistic updates. To achieve this, we
   introduce a difference between active and passive refspecs, which
-  make git_remote_download and git_remote_fetch to take a list of
+  make `git_remote_download()` and `git_remote_fetch()` to take a list of
   resfpecs to be the active list, similarly to how git fetch accepts a
   list on the command-line.
 
-* Rename git_remote_load() to git_remote_lookup() to bring it in line
-  with the rest of the lookup functions.
+* The THREADSAFE option to build libgit2 with threading support has
+  been flipped to be on by default.
 
-* The git_push struct to perform a push has been replaced with
-  git_remote_upload(). The refspecs and options are passed as a
-  function argument. git_push_update_tips() is now also
-  git_remote_update_tips() and the callbacks are in the same struct as
-  the rest.
+* The remote object has learnt to prune remote-tracking branches. If
+  the remote is configured to do so, this will happen via
+  `git_remote_fetch()`. You can also call `git_remote_prune()` after
+  connecting or fetching to perform the prune.
+
+
+### API additions
 
-* Introduce git_merge_bases() and the git_oidarray type to expose all
+* Introduce `git_buf_text_is_binary()` and `git_buf_text_contains_nul()` for
+  consumers to perform binary detection on a git_buf.
+
+* `git_branch_upstream_remote()` has been introduced to provide the
+  branch.<name>.remote configuration value.
+
+* Introduce `git_describe_commit()` and `git_describe_workdir()` to provide
+  a description of the current commit (and working tree, respectively)
+  based on the nearest tag or reference
+
+* Introduce `git_merge_bases()` and the `git_oidarray` type to expose all
   merge bases between two commits.
 
-* Introduce git_merge_bases_many() to expose all merge bases between
+* Introduce `git_merge_bases_many()` to expose all merge bases between
   multiple commits.
 
-* git_merge_head is now git_annotated_commit, to better reflect its usage
-  for multiple functions (including rebase)
-
 * Introduce rebase functionality (using the merge algorithm only).
-  Introduce git_rebase_init() to begin a new rebase session,
-  git_rebase_open() to open an in-progress rebase session,
-  git_rebase_commit() to commit the current rebase operation,
-  git_rebase_next() to apply the next rebase operation,
-  git_rebase_abort() to abort an in-progress rebase and git_rebase_finish()
+  Introduce `git_rebase_init()` to begin a new rebase session,
+  `git_rebase_open()` to open an in-progress rebase session,
+  `git_rebase_commit()` to commit the current rebase operation,
+  `git_rebase_next()` to apply the next rebase operation,
+  `git_rebase_abort()` to abort an in-progress rebase and `git_rebase_finish()`
   to complete a rebase operation.
 
-* Introduce git_note_author() and git_note_committer() to get the author
-  and committer information on a git_note, respectively.
+* Introduce `git_note_author()` and `git_note_committer()` to get the author
+  and committer information on a `git_note`, respectively.
 
-* git_note_create() has changed the position of the notes reference
-  name to match git_note_remove().
+* A factory function for ssh has been added which allows to change the
+  path of the programs to execute for receive-pack and upload-pack on
+  the server, `git_transport_ssh_with_paths()`.
 
-* The THREADSAFE option to build libgit2 with threading support has
-  been flipped to be on by default.
+* The ssh transport supports asking the remote host for accepted
+  credential types as well as multiple challeges using a single
+  connection. This requires to know which username you want to connect
+  as, so this introduces the USERNAME credential type which the ssh
+  transport will use to ask for the username.
 
-* The context_lines and interhunk_lines fields in git_diff_options are
-  now uint32_t instead of uint16_t. This allows to set them to UINT_MAX,
-  in effect asking for "infinite" context e.g. to iterate over all the
-  unmodified lines of a diff.
+* The `GIT_EPEEL` error code has been introduced when we cannot peel a tag
+  to the requested object type; if the given object otherwise cannot be
+  peeled, `GIT_EINVALIDSPEC` is returned.
 
-* git_status_file now takes an exact path. Use git_status_list_new if
-  pathspec searching is needed.
+* Introduce `GIT_REPOSITORY_INIT_RELATIVE_GITLINK` to use relative paths
+  when writing gitlinks, as is used by git core for submodules.
 
-* The fetch behavior of remotes with autotag set to GIT_REMOTE_DOWNLOAD_TAGS_ALL
-  has been changed to match git 1.9.0 and later. In this mode, libgit2 now
-  fetches all tags in addition to whatever else needs to be fetched.
+* `git_remote_prune()` has been added. See above for description.
 
-* The remote object has learnt to prune remote-tracking branches. If
-  the remote is configured to do so, this will happen via
-  git_remote_fetch(). You can also call git_remote_prune() after
-  connecting or fetching to perform the prune.
 
-* git_threads_init() and git_threads_shutdown() have been renamed to
-  git_libgit2_init() and git_libgit2_shutdown() to better explain what
-  their purpose is, as it's grown to be more than just about threads.
+* Introduce reference transactions, which allow multiple references to
+  be locked at the same time and updates be queued. This also allows
+  us to safely update a reflog with arbitrary contents, as we need to
+  do for stash.
 
-* git_libgit2_init() and git_libgit2_shutdown() now return the number of
-  initializations of the library, so consumers may schedule work on the
-  first initialization.
+### API removals
 
-* git_treebuilder_new (was git_treebuilder_create) now takes a
-  repository so that it can query repository configuration.
-  Subsequently, git_treebuilder_write no longer takes a repository.
+* `git_remote_supported_url()` and `git_remote_is_valid_url()` have been
+  removed as they have become essentially useless with rsync-style ssh paths.
+
+* `git_clone_into()` and `git_clone_local_into()` have been removed from the
+  public API in favour of `git_clone callbacks`.
+
+* The option to ignore certificate errors via `git_remote_cert_check()`
+  is no longer present. Instead, `git_remote_callbacks` has gained a new
+  entry which lets the user perform their own certificate checks.
+
+### Breaking API changes
 
-* git_treebuilder_create was renamed to git_treebuilder_new to better
+* `git_cherry_pick()` is now `git_cherrypick()`.
+
+* The `git_submodule_update()` function was renamed to
+  `git_submodule_update_strategy()`. `git_submodule_update()` is now used to
+  provide functionalty similar to "git submodule update".
+
+* `git_treebuilder_create()` was renamed to `git_treebuilder_new()` to better
   reflect it being a constructor rather than something which writes to
   disk.
 
-* git_checkout now handles case-changing renames correctly on
-  case-insensitive filesystems; for example renaming "readme" to "README".
+* `git_treebuilder_new()` (was `git_treebuilder_create()`) now takes a
+  repository so that it can query repository configuration.
+  Subsequently, `git_treebuilder_write()` no longer takes a repository.
 
-* git_index_name_entrycount() and git_index_reuc_entrycount() now
-  return size_t instead of unsigned int.
+* `git_threads_init()` and `git_threads_shutdown()` have been renamed to
+  `git_libgit2_init()` and `git_libgit2_shutdown()` to better explain what
+  their purpose is, as it's grown to be more than just about threads.
 
-* The search for libssh2 is now done via pkg-config instead of a
-  custom search of a few directories.
+* `git_libgit2_init()` and `git_libgit2_shutdown()` now return the number of
+  initializations of the library, so consumers may schedule work on the
+  first initialization.
 
-* Add support for core.protectHFS and core.protectNTFS. Add more
-  validation for filenames which we write such as references.
+* The `git_transport_register()` function no longer takes a priority and takes
+  a URL scheme name (eg "http") instead of a prefix like "http://"
 
-* The local transport now generates textual progress output like
-  git-upload-pack does ("counting objects").
+* `git_index_name_entrycount()` and `git_index_reuc_entrycount()` now
+  return size_t instead of unsigned int.
 
-* The git_submodule_update function was renamed to
-  git_submodule_update_strategy. git_submodule_update is now used to
-  provide functionalty similar to "git submodule update".
+* The `context_lines` and `interhunk_lines` fields in `git_diff`_options are
+  now `uint32_t` instead of `uint16_t`. This allows to set them to `UINT_MAX`,
+  in effect asking for "infinite" context e.g. to iterate over all the
+  unmodified lines of a diff.
 
-* git_checkout_index() can now check out an in-memory index that is not
-  necessarily the repository's index, so you may check out an index
-  that was produced by git_merge and friends while retaining the cached
-  information.
+* `git_status_file()` now takes an exact path. Use `git_status_list_new()` if
+  pathspec searching is needed.
 
-* git_cherry_pick() is now git_cherrypick().
+* `git_note_create()` has changed the position of the notes reference
+  name to match `git_note_remove()`.
 
-* Introduce git_buf_text_is_binary() and git_buf_text_contains_nul() for
-  consumers to perform binary detection on a git_buf.
+* Rename `git_remote_load()` to `git_remote_lookup()` to bring it in line
+  with the rest of the lookup functions.
 
-* Remove the default timeout for receiving / sending data over HTTP using
-  the WinHTTP transport layer.
+* `git_remote_rename()` now takes the repository and the remote's
+  current name. Accepting a remote indicates we want to change it,
+  which we only did partially. It is much clearer if we accept a name
+  and no loaded objects are changed.
 
-* Add SPNEGO (Kerberos) authentication using GSSAPI on Unix systems.
+* `git_remote_delete()` now accepts the repository and the remote's name
+  instead of a loaded remote.
 
-* git_signature_new() now requires a non-empty email address.
+* `git_merge_head` is now `git_annotated_commit`, to better reflect its usage
+  for multiple functions (including rebase)
 
-* Use CommonCrypto libraries for SHA-1 calculation on Mac OS X.
+* The `git_clone_options` struct no longer provides the `ignore_cert_errors` or
+  `remote_name` members for remote customization.
 
-* Disable SSL compression and SSLv2 and SSLv3 ciphers in favor of TLSv1
-  in OpenSSL.
+  Instead, the `git_clone_options` struct has two new members, `remote_cb` and
+  `remote_cb_payload`, which allow the caller to completely override the remote
+  creation process. If needed, the caller can use this callback to give their
+  remote a name other than the default (origin) or disable cert checking.
 
-* git_branch_upstream_remote() has been introduced to provide the
-  branch.<name>.remote configuration value.
+  The `remote_callbacks` member has been preserved for convenience, although it
+  is not used when a remote creation callback is supplied.
 
-* The GIT_EPEEL error code has been introduced when we cannot peel a tag
-  to the requested object type; if the given object otherwise cannot be
-  peeled, GIT_EINVALIDSPEC is returned.
+* The `git_clone`_options struct now provides `repository_cb` and
+  `repository_cb_payload` to allow the user to create a repository with
+  custom options.
 
-* Provide built-in objects for the empty blob (e69de29) and empty
-  tree (4b825dc) objects.
+* The `git_push` struct to perform a push has been replaced with
+  `git_remote_upload()`. The refspecs and options are passed as a
+  function argument. `git_push_update_tips()` is now also
+  `git_remote_update_tips()` and the callbacks are in the same struct as
+  the rest.
 
-* Introduce GIT_REPOSITORY_INIT_RELATIVE_GITLINK to use relative paths
-  when writing gitlinks, as is used by git core for submodules.
+* The `git_remote_set_transport()` function now sets a transport factory function,
+  rather than a pre-existing transport instance.
 
-* Introduce git_describe_commit and git_describe_workdir to provide
-  a description of the current commit (and working tree, respectively)
-  based on the nearest tag or reference
+* The `git_transport` structure definition has moved into the sys/transport.h
+  file.
+
+* libgit2 no longer automatically sets the OpenSSL locking
+  functions. This is not something which we can know to do. A
+  last-resort convenience function is provided in sys/openssl.h,
+  `git_openssl_set_locking()` which can be used to set the locking.