scmutil: seen.union should be seen.update (issue3476)

patch: keep patching after missing copy source (issue3480) When applying a patch renaming/copying 'a' to 'b' on a revision where 'a' does not exist, the patching process would abort immediately, without processing the remaining hunks and without reporting it. This patch makes the patching no longer abort and possible hunks applied on the copied/renamed file be written in reject files.

keyword: update copyleft

keyword: wlock cmdutil.copy wrapper Expanding/shrinking happens outside the wrapped copy function; therefore write lock the repo.

keyword: support commit --amend (issue3471) Include a test as well.

keyword: rename kwt.record attribute to kwt.postcommit A more general descriptive name, as the attribute will be used for commit --amend as well.

scmutil: use _winreg.HKEY_LOCAL_MACHINE

win32: move lookupreg() to windows.py lookupreg() doesn't use the win32 API directly any more, it uses the Python standard library module _winreg.

win32: use Python's _winreg again This is a partial backout of f1fa8f481c7c. f1fa8f481c7c switched win32.py to using ctypes with the intention to get rid of the dependency on the pywin32 package. But f1fa8f481c7c replaced the usage of the Python standard module _winreg in lookup_reg as well, which was uneeded (note that lookup_reg was later renamed into lookupreg). Basically, we're switching back to the previous _winreg-based implementation, which uses _winreg.QueryValueEx(). QueryValueEx returns a unicode code string. See also: issue3467

localrepo: clear _filecache earlier to really force reloading (issue3462) ce0ad184f489 attempted to force the filecaches in localrepo to reload everything after a rollback. But simply clearing _filecache isn't enough, invalidate() needs to be called before/after. localrepo._rollback calls invalidate() already, so we clear the map right afterwards which ensures everything will be reread.