Update to new Alt-Svc header format
Continute update to latest header format

Also, cleanup a bunch of trailing whitespace.
Use proper ALPN token for spdy/3
Placeholder in Http2Session for altsvc mapping
Better version checking in channel
Parse ALTSVC frames in http/2
Refactor nsNSSSocketInfo::JoinConnection into joinable and real join
Check origin for stream-0 altsvc frames
Plumb in npn token limiting
Make frame parse properly, lots of logging
Revert (for now) npn token limiting
Re-enable NPN token limiting

* still have to disable default, non-npn connection
* have to fix parsing in ProcessAltService to get right token
Fix parsing of npn token from Alt-Svc header
signed/unsigned
Attempt to fix linux & os x opt compile errors without breaking win32
! not !!
Fix merge issue
Merge pull request #1 from todesschaf/wip/altsvc-for-pr

altsvc updates