smtplib can not log in to some server using command AUTH PLAIN, it sends
``user\0user\0pass'' to the server, but ``\0user\0pass'' has better
compatibility.

errors don't get provoked that way. Also add a bunch of cross-references
to bugs.

is pointless.

Also add a note to the docs for the 'test' package that test cases should check
first that any conditions needed in the operating system are met before having
a test run.

Closes bug #1077302.  THanks, Ian Holsman.

Changed signature of call function to avoid confusion: this 'args' is not the same as the one to the Popen constructor

caused by a self._input.readline() call that wasn't checking for the
NeedsMoreData marker.

msg_43.txt contains a message that illustrates the problem, when
email.message_from_*() is called.  That interface uses the Parser API, which
splits reads into 8192 byte chunks.  It so happens that for the test message,
the 8192 chunk falls inside a message/delivery-status, which is where in the
FeedParser the readline() call was that didn't check for NeedsMoreData.

I also added an assert to unreadline() so it'll be more evident if an attempt
to push back NeedsMoreData ever happens again.

Bump the email package version number.

(First draft of patch contributed by Steven Bethard.)

(Submitted by some anonymous person with an amazing eye for grammer nits.)

Will backport.