- Make data range checking consistent for Port Number.

- Replaced many \d* with quicker regex
- for 'resolver-query-timeout', constrained to <0-30000> ms
- for 'resolver-retry-timeout', constrained to <0-30000> ms
- for 'servfail-ttl',  constrained to <0-30>
- for 'min-cache-ttl', constrained to <0-90>
- for 'clients-per-query', constrained to <0-1200>
- for 'lame-ttl', constrained to <0-1800>
- for 'max-cache-ttl', constrained to <0-604800> (1 week)
- for 'max-refresh-time', constrained to <0-2419200> (24 weeks)
- for 'min-refresh-time', constrained to <0-2419200> (24 weeks)
- for 'min-retry-time', constrained to <0-2419200> (24 weeks)
- for 'max-retry-time', constrained to <0-2419200> (24 weeks)
- for various UID/GID, constrained  to <0-65535>
- for file permission, constrained  to <0000-3777> (octet)
- for 'dlz' clause, identifier is quotable.
- for identifier of 'key' clause, highlight was missing
- for identifier of 'dual-stack', fix wildcard
- for 'dialup' option, fix highlight for 'notify' AND 'notify-passive'

Author: egberts