Merge branch 'master' into sp/reflog

* master: (90 commits)
  fetch.c: remove an unused variable and dead code.
  Clean up sha1 file writing
  Builtin git-cat-file
  builtin format-patch: squelch content-type for 7-bit ASCII
  CMIT_FMT_EMAIL: Q-encode Subject: and display-name part of From: fields.
  add more informative error messages to git-mktag
  remove the artificial restriction tagsize < 8kb
  git-rebase: use canonical A..B syntax to format-patch
  git-format-patch: now built-in.
  fmt-patch: Support --attach
  fmt-patch: understand old <his> notation
  Teach fmt-patch about --keep-subject
  Teach fmt-patch about --numbered
  fmt-patch: implement -o <dir>
  fmt-patch: output file names to stdout
  Teach fmt-patch to write individual files.
  built-in tar-tree and remote tar-tree
  Builtin git-diff-files, git-diff-index, git-diff-stages, and git-diff-tree.
  Builtin git-show-branch.
  Builtin git-apply.
  ...

1 files changed, 14 insertions, 0 deletions

diff --git a/builtin-check-ref-format.c b/builtin-check-ref-format.c
new file mode 100644
index 0000000000..4a23936aff
--- /dev/null
+++ b/builtin-check-ref-format.c
@@ -0,0 +1,14 @@
+/*
+ * GIT - The information manager from hell
+ */
+
+#include "cache.h"
+#include "refs.h"
+#include "builtin.h"
+
+int cmd_check_ref_format(int argc, const char **argv, char **envp)
+{
+	if (argc != 2)
+		usage("git check-ref-format refname");
+	return !!check_ref_format(argv[1]);
+}