Fix theoretical issue in filecommit.
If the file was copied, we don't want to reuse the original entry.
I think this is mostly a theoretical issue - when there are copies,
fp1 == nullid, so it's very unlikely that the fl.cmp(fp1, t) would
think the file was unmodified. In any case, if there was a copy,
we should forcefully create a new entry.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://www.selenic.com/mercurial/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.