HTTP/2.0 protocol identifier string (#323)

Patrick has generously provided us with a pull request.

TLS Client Hello's between 256 and 512 bytes need to be rounded up to
512 for compatibility reasons. This incents us to keep Client Hello
parameters as small as possible to avoid the rounding - this change
shortens the ALPN token of HTTP/2.0 to be simply "h2"

Those who have been following the ALPN drama might find this
attractive.  Does anyone find this change objectionable?

Received on Sunday, 17 November 2013 05:32:10 UTC