share: handle --relative shares to a different drive letter gracefully
This had the same problem as
f445b10dc7fb. Banning os.path.relpath() is
tempting, but the hint it provides is useful here.
py3: handle keyword arguments in hgext/gpg.py
Differential Revision: https://phab.mercurial-scm.org/D1303
py3: handle keyword arguments in hgext/fetch.py
Differential Revision: https://phab.mercurial-scm.org/D1302
py3: handle keyword arguments in hgext/extdiff.py
Differential Revision: https://phab.mercurial-scm.org/D1301