v0.1.9-nftables

This is a feature release with a bit of bug squashing.

Main changes:

• -manage and -install scripts: Changed the syntax for protocols/ports specific geoblocking to a more user-friendly one, support granular config for each protocol, support multiple -p options in one command.
• -manage: Status report now includes information about protocols and ports geoblocking config
• -manage: implemented new action 'showconfig' which prints the contents of the config file
• improved validation and error checking in the ports/protocols parsing code
• compacted some code by implementing additional functions in the -common script

Full Changelog: v0.1.8-nftables...v0.1.9-nftables