Allow LF/CR and empty lines to separate IPv6 and semicolon symbol.

- Many statements and options can allow  Vim syntax qualifiers  of  `skipwhite skipnl skipempty`, added those.
- For `key` clause, fixed highlight of algorithm names
- Fixed many options (not Option, but clause/statement/option) and their highlighting of statement-ending semicolon and its highlighting.
- For 'tcp-keepalive', switched to match instead of keyword.
-  Break apart the  namedOSV_UdpSize into three separate section due to Vim's limitation.
- Change highlight for 'query-source' port value from Error to Number.
- Change highlight for `dnstap` options from Builtin (red) to  Type (blue).
- Fixed dualstack port highlighting.
- Change `catalog-zone` `zone-directory`  from Clause to Option highlight color.
- Fixed 'rrset' domain name.
- Point to `namedO_Dscp` in namedStmt_OptionSection, was incorrectly pointed to namedO_DscpNumber.
- Reordered 'namedO_UdpPorts' and 'namedOSV_UdpSize' in namedStmt_OptionsSection for a better sieve effect (wasn't catching UdpSize).
- b

Author: steve