Added DNPT and SNPT targets.
Recognize -4 and -6 options (and their long form).
More comments.
Speed up recognition of options, if last option is an action.
Optimized lookup if previous option is a match or target.
Fix: don't show -j if -g is given and vice versa.
Remove unused str_chain variable.
Remove unnecessary check for proto when enumerating options.
If a match that also is a protocol is specified and
-p|--protocol is requesting a proto, display only the matching one.
Removed some return instructions.
Only display help after the target if it is a known target (no chain).
Update Readme.
Added check for --src-pfx|--dst-pfx.
Fix: missing got_rule_opt=1 for -p.
Bump version to 1.0-alpha-15.