give more info to hgmerge script.

merge util.esystem and util.system.

undo edit that was accident.

fix broken environment save/restore when a hook runs. move "run commend with different env/cwd" code out to function in util. new function is called esystem.

make clean now removes generated documentation.

Make #!/usr/bin/env python in test-bdiff run the specified python version.

change lock format to let us detect and break stale locks. old style: symlink to pid new style: symlink to hostname:pid if lock code finds new-style lock, it breaks lock if locking pid is on same machine and pid is not alive. otherwise, lock is left alone. this makes locking code safe with old-style locks and with locks on other machines. new code makes server part of mercurial more robust in case machine crashes, power fails, or crazy user does kill -9.

Catch hgrc interpolation errors nicely.

Catch other exceptions (e.g. util.Abort) in parse(), too. This has the benefit of removing duplicate catching of AmbiguousCommand and UnknownCommand, and keeping all exception handling together.

Inherit config from real parentui and don't use ConfigParser internals. Added comments for the meaning of parentui.

Added check for minimal python version to setup.py

merge with crew.

patchbomb: ignore exception if pager quits.

make push over http print good error message.

Reordered options for remove, fixed synopsis for rename.