Patch by Ethan Furman.

Suggestion and patch by Mike Hoy.

Patch by Robin Schreiber.

Found by Coverity.

Patch by Francisco Martín Brugué.

for certain locales (utf-16 and utf-32 family).

Patch by Chris Jerdonek.

Patch by Kushal Das.

Patch by Chris Jerdonek.

This is analogous to the link for `flie objects` in the description of
'open' that exists in the 2.7 docs, and adds a similar link to the
io docs.

Patch by Chris Jerdonek.

Update the getpeercert() example with a real-world cert showing non-trivial issuer, subject and subjectAltName.

When adding a message from a binary file, \r\n was translated to
\r\r\n in the message body.

Patch by Serhiy Storchaka.

Patch by Chris Jerdonek.

Patch by Chris Jerdonek.

Patch by Chris Jerdonek.

Patch by Yury Selivanov.