bpo-38907: Suppress any exception when attempting to set V6ONLY. (GH-17864) (GH-17865)

Fixes error attempting to bind to IPv4 address.
(cherry picked from commit 7cdc31a14c824000cbe8b487900c9826a33f6940)

Co-authored-by: Jason R. Coombs <jaraco@jaraco.com>

Co-authored-by: Jason R. Coombs <jaraco@jaraco.com>
1 file changed