MINOR: protocol: Create proto_quic QUIC protocol layer.

MINOR: protocol: Create proto_quic QUIC protocol layer.

As QUIC is a connection oriented protocol, this file is almost a copy of
proto_tcp without TCP specific features. To suspend/resume a QUIC receiver
we proceed the same way as for proto_udp receivers.

With the recent updates to the listeners, we don't need a specific set of
quic*_add_listener() functions, the default ones are sufficient. The fields
declaration were reordered to make the various layers more visible like in
other protocols.

udp_suspend_receiver/udp_resume_receiver are up-to-date (the check for INHERITED
is present) and the code being UDP-specific, it's normal to use UDP here.
Note that in the future we might more reasily reference stacked layers so that
there's no more need for specifying the pointer here.