do not require remote_port to exist at remote_ip
do not require remote_port to exist at remote_ip

this has a bug whereby if the list of remote_ports is not the same
size as the list of real matching ports, then the list of port names
will be short, and port descriptions may be assigned to the wrong
ports, or the query may crash. needs testing.

netdisco/netdisco,netdisco/netdisco,netdisco/netdisco