Add shorewall::blacklist
Add initial support for shorewall[6]-blrules

Beginning with Shorewall 4.4.25, the preferred method of blacklisting and whitelisting is to use the blrules file."
Some minor fixups before merging

- Move static headers to files and source them
- Fix a typo in the header name
- Can't reset a puppet manifest value
Fix conditional values in some more places
Merge pull request #3 from raoulbhatia/master

Add shorewall::blacklist