seport: multiple port configs for one service

[mhellmic]

Changed seport so that it allows selinux configurations for several ports for the same service. The use case is allowing multple ports for httpd, so to the same policy name, which means the same function name, which doesn't work.

The implementation does not make this function nicer, so it's discussable :) On the upside, it's backwards-compatible.

[mfournier]

Thanks for your patch @mhellmic ! I merged it just now after fixing the conflicts I introduced by passing the module through puppet-lint :-/