#17471 - Increasing the urllib.error test coverage. Bringing it to 100%. Based on patch contributed by Daniel Wozniak

specifically addresses a stack misalignment issue on x86 and issues
on some more recent platforms.

Structured Exception Handling on windows.

specifically addresses a stack misalignment issue on x86 and issues
on some more recent platforms.

I have no idea how one would write a test for this.

Patch by July Tikhonov.

I have no idea how one would write a test for this.

Patch by July Tikhonov.

I have no idea how one would write a test for this.

Patch by July Tikhonov.

In Python2 Popen uses *FILE objects, which wind up buffering even though
subprocess defaults to no buffering.  In Python3, subprocess streams really
are unbuffered by default, but the imaplib code assumes read is buffered.  This
patch uses the default buffer size from the io module to get buffered streams
from Popen.

Much debugging work and patch by Diane Trout.

The imap protocol is too complicated to write a test for this simple
change with our current level of test infrastructure.

In Python2 Popen uses *FILE objects, which wind up buffering even though
subprocess defaults to no buffering.  In Python3, subprocess streams really
are unbuffered by default, but the imaplib code assumes read is buffered.  This
patch uses the default buffer size from the io module to get buffered streams
from Popen.

Much debugging work and patch by Diane Trout.

The imap protocol is too complicated to write a test for this simple
change with our current level of test infrastructure.