Based on patch by Xiang Zhang.

Based on patch by Xiang Zhang.

Upstream https://github.com/python/asyncio/pull/408 by Ron Frederick.

Upstream https://github.com/python/asyncio/pull/374 by Ron Frederick.

Patch by Ville Skyttä.

Perhaps the BytesParser 'text' argument should really be bytes, but
it hasn't been, it has been text, so for backward compatibility
and for consistency with the regular Parser class, I'm keeping it
as 'text'.