Options which have aliases (i.e. --sport|--source-port) will have the others suppressed,
as soon one name is used.
Disallow option after --new|-N.
Available matches and their options are now selected upon
what application is calling (ip[6]tables) completion.
Added icmp and icmp6 to the matches.
Added completion on icmp and icmpv6 types.
Don't complete on option requests for the tcp/udp match,
if an option value is expected.