* "git refs exists" that works like "git show-ref --exists" has been
added.
+ * "repo info" learns a short-hand option "-z" that is the same as
+ "--format=nul", and learns to report the objects format used in the
+ repository.
+
Performance, Internal Implementation, Development Support etc.
--------------------------------------------------------------
which items are still on the queue (an unacceptable alternative is
to reserve one object flag bits).
+ * The bulk-checkin code used to depend on a file-scope static
+ singleton variable, which has been updated to pass an instance
+ throughout the callchain.
+
Fixes since v2.51
-----------------
which has been disabled in Gitlab CI.
(merge 608cf5b793 ps/gitlab-ci-disable-windows-monitoring later to maint).
+ * A broken or malicious "git fetch" can say that it has the same
+ object for many many times, and the upload-pack serving it can
+ exhaust memory storing them redundantly, which has been corrected.
+ (merge 88a2dc68c8 ps/upload-pack-oom-protection later to maint).
+
* Other code cleanup, docfix, build fix, etc.
(merge 823d537fa7 kh/doc-git-log-markup-fix later to maint).
(merge cf7efa4f33 rj/t6137-cygwin-fix later to maint).
(merge 2f4bf83ffc km/alias-doc-markup-fix later to maint).
(merge b0d97aac19 kh/doc-markup-fixes later to maint).
(merge f9a6705d9a tc/t0450-harden later to maint).
+ (merge c25651aefd ds/midx-write-fixes later to maint).
+ (merge 069c15d256 rs/object-name-extend-abbrev-len-update later to maint).
+ (merge bf5c224537 mm/worktree-doc-typofix later to maint).