convert: handle past or foreign partial svn copies Subversion allows revisions to be composed of subparts coming from revisions before the parent or from other part of the repository. There is no simple representation for these now, keep the changes but do not track their origins.

convert: more cleanup in svn directory copy handling

convert: svn directory copy handling cleanup

convert: improve subversion branch filtering

convert: rename get_entry_from_path() into an svn_source method

convert: fix subpaths detection in svn source

test-convert-svn-branches: short identifiers are more legible