merge: fix a bug where copies were getting ignored

Move back the purge extension in hgext

purge: abort with missing files avoiding problems with name-mangling fs In a name mangling filesystem (e.g. a case insensitive one) dirstate.walk() can yield filenames different from the ones stored in the dirstate. This already confuses the status and add commands, but with purge this may cause data loss. To prevent this purge refuses to work if there are missing files and has a 'force' option if the user knows it is safe. Even with the force option purge checks if any of the missing files is still available in the working dir: if so there may be some problem with the underlying filesystem, so it unconditionally aborts.

Merge last few matcher/locate fixes.

locate: don't print "file not found" messages. This should fix issue204.

change relglob: patterns to be consistent with glob: patterns With this change, you have to use "hg locate 'hgweb/**'" to locate all the files in directories named hgweb. OTOH, "hg locate '*l'" will locate only files that end with "l" - e.g. a file called "hg.py" will not be matched just because it's in a directory whose name ends with "l" (e.g. "mercurial").

Revert changeset ef1f1a4b2efb; add another test for glob: patterns With that changeset, it's impossible to use a glob: pattern to match e.g. all files ending in .py - glob:**.py would also match all files in a directory called dir.py.

Fixups for recent changes in revlog version handling

hgweb: don't display heads in gitweb-style summary page

hgweb: display named branches in gitweb-style summary page