Ignore reserved bit when parsing stream IDs
Ignore reserved bit when parsing stream IDs

The stream ID in the header of an HTTP/2 frame should be a 31-bit
integer, rather than a 32-bit integer. However, it is serialized in 4
octets, where the most significant bit of the first octet is "reserved"
and MUST be ignored when received.

mlalic/solicit,stepancheg/solicit