The formula currently adds a Listen directive for the port '*' if
any configured vhost is configured to listen on :* which does not
work and instead prevents apache from starting.

It is possible to prevent this by setting the
exclude_listen_directive pillar to True but this is a manual
workaround.

Instead, this commit excludes :* Listeners automatically.

Including optional per-OS templates

(Solves https://github.com/saltstack-formulas/apache-formula/issues/153)