meta: git controls for text changelogs; github controls

For the ChangeLog and files like it, use `merge=union` to bring in
content from both sides instead of having conflicts block merges because
someone else added a feature.

For GitHub, provide some "templates" which really just point people in
the right direction, but if the repointing fails, at least reduces the
pain a little.

1 files changed, 41 insertions, 0 deletions

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+# The Exim Project does not use GitHub Issues
+
+Hey, we want your input, but we want to make sure that we actually see it and
+that your help is not wasted, so please read this.
+
+The GitHub repo exists for convenience for some folks, and to host our Wiki.
+The Git repo is an automated clone of our real repo over at
+<https://git.exim.org/exim.git>.
+
+Sometimes a maintainer will take a look at GitHub pull requests, just because
+we care about the software and want to know about issues, but expect long
+delays.  It's not a really supported workflow.
+
+Our bug-tracker takes code-patches and is the place to go:
+<https://bugs.exim.org/>
+
+If you've found a security bug, then please email <security@exim.org>.
+All Exim Maintainers can and do use PGP.
+Keyring: <https://ftp.exim.org/pub/exim/Exim-Maintainers-Keyring.asc>
+We don't have a re-encrypting mailer, just encrypt to all of them please.
+
+## If this is too much hassle ...
+
+We do periodically get around to checking GitHub Pull Requests.
+It just won't be fast.
+
+Patches should update the documentation, `doc/doc-docbook/spec.xfpt`; if you
+like, just provide the plaintext which should go in there and we can mark it
+up.
+
+If it's a whole new feature, then please guard it with a build
+option `EXPERIMENTAL_FOO`; docs are in plaintext in
+`doc/doc-txt/experimental-spec.txt`.
+
+If you're feeling particularly thorough, these files get updated too:
+* `doc/doc-txt/ChangeLog` : all changes; workflow pre-dates Git
+* `doc/doc-txt/NewStuff` : if it's a change in intended behavior which postmasters should read
+* `doc/doc-txt/OptionLists.txt` : (we usually defer this until cutting a release)
+* `src/README.UPDATING` : if you're breaking backwards compatibility
+
+Thanks!