3.3:
This is a regularly scheduled feature release with over 800 changes.
1.1. commands
add: add back forgotten files even when not matching exactly (BC)
addremove: add back forgotten files (BC)
addremove: add support for the -S flag
addremove: print relative paths when called with -I/-X (BC)
addremove: support addremove with explicit paths in subrepos
backout: add --commit option
commit: abort if --addremove is specified, but fails
commit: remove reverse search for copy source when not in parent (issue4476)
commit: propagate --addremove to subrepos if -S is specified (issue3759)
graft: show more useful status information while grafting
1.2. core
bundles: do not overwrite existing backup bundles (BC)
osx: patch .pax.gz files in pkg bundles so they extract as root (issue4081)
revset: handle hidden linkrev for file missing for head (issue4490)
revset: allow rev(-1) to indicate null revision (BC)
revset: fix ancestors(null) to include null revision (issue4512)
subrepo: don't abort in add when non-hg subrepos are present (issue4513)
cmdserver: use given streams as pipe channels like other commands
extensions: only check compatibility against major and minor versions (BC)
https: support tls sni (server name indication) for https urls (issue3090)
ignore: resolve ignore files relative to repo root (issue4473) (BC)
linkrev: handle filtered linkrev with no visible children (issue4307)
linkrev: also adjust linkrev when bootstrapping annotate (issue4305)
linkrev: use the right manifest content when adjusting linrev (issue4499)
memctx: calculate manifest correctly with newly-removed files (issue4470)
memctx: fix manifest for removed files (issue4470)
obsstore: disable garbage collection during initialization (issue4456)
subrepo: support remove with explicit paths in subrepos
subrepo: add full revert support for git subrepos
subrepo: add partial diff support for git subrepos
subrepo: add status support for ignored files in git subrepos
win32: remove Mercurial.ini file from Inno Setup installer (issue4435)
1.3. hgweb
hgweb: allow viewing diffs against p1 or p2 for merge commits (issue3904)
1.4. extensions
color: add support for colorizing git subrepo diffs
color: add missing 'dim' in _effects
convert: on svn failure, note libsvn version (issue4043)
convert: replace revision references in messages if they are >= short hashes
convert: handle LookupError in mercurial_source.lookuprev()
extdiff: reintroduce backward compatibility with manual quoting of parameters
histedit: add a test to show that issue4251 is fixed (issue4251)
largefiles: fix commit of a directory with no largefile changes (issue4330)
largefiles: use 'default' path for pulling largefiles, not 'default-push'
largefiles: enable subrepo support for add, forget, remove
largefiles: show progress when checking standin hashes in outgoing changesets
mq: smarter handling of plain headers
patchbomb: don't honor whitespace and format-changing diffopts (BC)
rebase: show more useful status information while rebasing
rebase: ensure rebase revision remains visible (issue4504)
extdiff: avoid unexpected quoting arguments for external tools (issue4463)
highlight: ignore Unicode's extra linebreaks (issue4291)
record: don't honor format-changing diffopts (issue4459)
share: add option to share bookmarks
transplant: properly skip empty changeset (issue4423)
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