extdiff: un-nested two functions The functions in extdiff that create temporary repo copies for are useful in other extensions, so the change moves them at the module level.

convert: remove accidental debug print

convert: use '.' as destination name if renaming subdir into root

Automated merge with http://hg.intevation.org/mercurial/crew

convert: only get history for requested revs when converting hg repo

convert: raise correct type of exception if svn converter can't handle rev

record: raise an exception correctly if we can't create a backup directory

record: work properly if invoked in a subdirectory

convert: replace fork with subprocess call.

convert: support windows SVN simple auth provider