Add support for Diffie-Hellman parameters in VHOST resource.
Merge commit '96475098ebd4fba7dd951efcee1c6ee38b2935a9' into ssl_dhparam

Conflicts:
	manifests/resource/vhost.pp
Merge pull request #212 from hdanes/ssl_dhparam

Add support for Diffie-Hellman (SSL) parameters in VHOST resource.