[issue10947] imaplib: Internaldate2tuple and ParseFlags require (and latter returns) bytes arrays; should allow/return str

[Alexander Belopolsky]

Changes by Alexander Belopolsky <belopolsky at users.sourceforge.net>:


----------
stage:  -> patch review

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10947>
_______________________________________