extend validate_port to port range

[a3an-k]

validaten of Ports accept new also port Ranges and checkts if the ports are within the allowed Portranges

[ansibleguy]

@a3an-k Could you provide a link to the port-range feature you are referring to?

The option to use aliases and port-ranges in rules was fixed already: #86 (by disabling client-side port validation completely)

I can't find any link to this validation for the alias module.

The Alias docs state that a range needs to be 29:49 NOT 29-49 => https://docs.opnsense.org/manual/aliases.html#alias-types
I confirmed this using the WebUI.

The validate_port function is used in multiple modules/places - a port-range is not a valid option for all use-cases. So I would make it optional with an opt-in flag.