MINOR: xprt_quic: adjust flow-control according to bufsize

Redefine the initial local flow-control to enforce by us. Use bufsize as
the maximum offset allowed to be received.

This change is part of an adjustement on the Rx path. Mux buffer will be
converted to a ncbuf. Flow-control parameters must ensure that we never
receive a frame larger than the buffer. With this, all received frames
will be stored in the MUX buffer.
1 file changed