MINOR: quic: specify show quic output fields

MINOR: quic: specify show quic output fields

Add the possibility to customize show quic full output with only a
specific set of printed fields. This is specified as a comma-separated
list. Here are the currently supported values :
* tp: transport parameters
* sock: connection addresses and socket FD
* pktns: packet number space with ack ranges and in flight bytes
* cc: congestion controler and loss information

Note that streams output is not filtered by this mechanism. It's because
it will be replaced soon by an output generated from the MUX which will
use its owned field name.