Each connection type can be abbreviated by the first character as
{c,i,m,d,v,s,u} respectively.
If ProtoList and dstHostList are given, this control is applied only
to the protocols and hosts included in the lists. For example,
to use cached data in a host which is not connected to external networks,
specify as CONNECT="cache:*:!./@".
Note:
In current implementation, "cache" will be tried first anyway if it is
included in the connSeq.
A combination of -Pport with CONNECT=udp relays from TCP client
to UDP server,
and -Pport/udp with non-udp CONNECT relays from UDP client
to TCP server.