addchangegroup: pass in lock to release it before changegroup hook is called
Currently, callers of addchangegroup first acquire the repository
lock, usually to check that an unbundle request isn't racing. This
means that changegroup hook actions that might write to a repo get
stuck waiting for a lock. Here, we add a new optional lock parameter
and update all the callers. Post-1.6 we may make it non-optional.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://mercurial.selenic.com/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.