Relax advanced options firewall rules tests

Various advanced options are now possible for any protocol since https://github.com/pfsense/pfsense/commit/653bde345e8f960de5bc745fe74e64d8ef3fd2d3
So allow these through the front-end GUI validation also.
Code change for 2.1 branch.
Merge pull request #774 from phil-davis/RELENG_2_1

Relax advanced options firewall rules tests (2.1)