[issue6041] change sdist and register command so they use check

[Tarek Ziadé <report@bugs.python.org> at psf.upfronthosting.co.za]

Tarek Ziadé <ziade.tarek at gmail.com> added the comment:

the old check_metadata method, duplicated in sdist and register, will be
marked with a PendingDeprecationWarning.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6041>
_______________________________________