Added check if -S switch is available, otherwise quit program.
Allow multiple use of the set match.
Don't display match or target options any more, if a non-extension
option has been placed after the first extension option.
Also display non-extension optons after the first extension option
has been placed.
Fixed de-duping of options.
No more diplay of options if an interface name is expected.
Don't complete on options after --add-set|--del-set and the set
name following.
No more space is appended after completing an ipset set flag.