[3.13] gh-122792: Make IPv4-mapped IPv6 address properties consistent with IPv4 (GH-122793) (GH-123815) Make IPv4-mapped IPv6 address properties consistent with IPv4. (cherry picked from commit 76a1c5d18312712baed4699fe7333abb050ec9b7) Co-authored-by: Seth Michael Larson <[email protected]>