#1858 from Tarek Ziade:

#1858 from Tarek Ziade:
Allow multiple repositories in .pypirc; see http://wiki.python.org/moin/EnhancedPyPI
for discussion.

The patch is slightly revised from Tarek's last patch: I've simplified
the PyPIRCCommand.finalize_options() method to not look at sys.argv.
Tests still pass.