filemerge: introduce a 'regkeyalt' merge tool variable
This allows us to provide alternate search keys for 64bit operating systems that
may have 32bit merge tools installed. Presumably it may find other uses.
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
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.