relnotes: add 6.8.2

relnotes/6.8

@@ -1,77 +1,99 b''
+= Mercurial 6.8.2 =
+
+This is the last version that supports Python 3.6 and 3.7.
+
+ * Compatibility for Python 3.12 and 3.13
+ * evolution: stop wrongly flagging unrelated part of a split as divergent
+ * histedit: create state and acquire locks earlier
+ * copytracing: fix a bug in an edge case in metadata.compute_all_files_changes
+ * rhg: ignore readonly FS error when saving dirstate
+ * merge: sort filemap only if requested by the caller
+ * windows: implement `util.cachestat` to fix numerous dirstate problems
+ * subrepo: propagate non-default path on outgoing
+ * import: fix erroneous comparison of str with bytes
+ * largefiles: fix check that ensures that --all-largefiles is only used locally
+ * profiling: improve 3.12 error message for calling lsprof twice
+ * profiling: use "stat" profiler to profile individual request
+ * module-policy: ignore empty module policy
+ * relnotes: skip the test if the source repository is not readable
+ * wireprototypes: fix exception handling code with a bad pytype suppression
+ * Many more type fixes and improvements
+ * Improvements to the test suite
+
 = Mercurial 6.8.1 =
 
  * Python 3.12: fix an issue between `threading` and `demandimport`
  * rhg: expand user and environment variable in paths to ignore in config and
    includes
  * `win32mbcs` extension: fix an encoding issue
 
 = Mercurial 6.8 =
 
 As usual, a *lot* of patches don't make it to this list.
 
 == New Features or performance improvements ==
 
  * Phases have been reworked to improve their general performance
     * revset: stop serializing node when using "%ln"
     * phases: convert remote phase root to node while reading them
     * phases: use revision number in new_heads
     * phases: use revision number in analyze_remote_phases
     * phases: stop using `repo.set` in `remotephasessummary`
     * phases: move RemotePhasesSummary to revision number
     * phases: use revision number in `_pushdiscoveryphase`
     * phases: introduce a performant efficient way to access revision in a set
     * phases: rework the logic of _pushdiscoveryphase to bound complexity
  * The Rust working copy code is being used by more places now:
      * matchers: support patternmatcher in rust
      * dirstate: remove the python-side whitelist of allowed matchers
  * stream-clone: disable gc for `_entries_walk` duration
  * stream-clone: disable gc for the initial section for the v3 format
  * postincoming: avoid computing branchhead if no report will be posted
  * stream-clone: disable gc for the entry listing section for the v2 format
  * perf: allow profiling of more than one run
  * perf: run the gc before each run
  * perf: start recording total time after warming
  * perf: clear vfs audit_cache before each run
  * outgoing: rework the handling of the `missingroots` case to be faster
  * outgoing: add a simple fastpath when there is no common
  * tags-cache: skip the filternode step if we are not going to use it
  * tags-cache: directly operate on rev-num warming hgtagsfnodescache
  * tags-cache: directly perform a monimal walk for hgtagsfnodescache warming
 
 == New Experimental Features ==
 
  * Introduce a new experimental branch cache "v3":
     * branchcache: add more test for the logic around obsolescence and branch heads
     * branchcache: skip entries that are topological heads in the on disk file
     * branchcache: add a "pure topological head" fast path
     * branchcache: allow to detect "pure topological case" for branchmap
 
 == Bug Fixes ==
 
  * rust: use `cpython` 0.7.2 crate to add support for Python 3.12
  * perf-stream-locked-section: actually use v1 generation when requested
  * perf-stream-locked-section: fix the call to the v3 generator
  * perf-stream-locked-section: advertise the right version key in the help
  * stream: in v3, skip the "size" fast path if the entries have some unknown size
  * stream-clone: stop getting the file size of all file in v3
  * streamclone: stop listing files for entries that have no volatile files
  * perf-stream-consume: use the source repository config when applying
  * bundle: do no check the changegroup version if no changegroup is included
  * perf: create the temporary target next to the source in stream-consume
  * bundlespec: fix the "streamv2" and "streamv3-exp" variant
  * push: rework the computation of fallbackheads to be correct
  * profiler: flush after writing the profiler output
  * base-revsets: use an author that actually exercises a lot of changesets
  * hgrc: search XDG_CONFIG_HOME on mac
  * clonebundles: add missing newline to legacy response
  * narrow: add a test for linkrev computation done during widen
  * Multiple fixes to guard against mmap issues
  * portability: fix build on Solaris-derived systemd
 
 == Backwards Compatibility Changes ==
 
 == Internal API Changes ==
 
 == Miscellaneous ==
 
  * obsolete: quote the feature name
  No newline at end of file