SETTINGS_MAX_CONCURRENT_STREAMS allows the sender to inform
the remote endpoint the maximum number of concurrent streams
which it will allow. By default there is no limit. For
implementors it is recommended that this value be no smaller
It's the same text as we've had in SPDY/2, and our SPDY/4 draft is the
same. This wording is technically correct, but it does not
particularly emphasize that the limit is directional. I can imagine
first time readers misinterpreting it.