change pg_hba.conf to be owned by postgres user account

At present, the ownership of pg_hba.conf is hardwired to be uid 0.  It should have the same ownership as all of the other postgressql configuration files in the same cluster so that they can be managed/edited by the postgres role user (system) account.
Add class postgresql::lib::perl for perl support
Merge pull request #401 from cfeskens/add-perl-support

Add class postgresql::lib::perl for perl support
Merge pull request #372 from jhoblitt/feature/pg_hba.conf-ownership

change pg_hba.conf to be owned by postgres user account
Add support for port parameter to postgresql::server, fix underlying assumptions that port=5432
Merge pull request #404 from thunderkeys/postgresql-server-port-support

Add support for port parameter to postgresql::server