TS-3261: Fix SSL BIO memory leak issue introduced in TS-3006
[TS-3265]: Fix spdy req_map access to use iterator instead of operator[]
TS-3265 Fix indentation, 120 character lines
TS-3262 Change abs() to std::abs(), avoid compiler errors
TS-3262 Check _hostname[0], which seems correct
Update release date.
Update CHANGES with the backported changes.