Disable apache2 service.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1075 3c3d7b80-5828-415e-9f61-280b98178fff
Various improvements.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1076 3c3d7b80-5828-415e-9f61-280b98178fff
Introduce helper scripts nginx_ensite and nginx_dissite.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1077 3c3d7b80-5828-415e-9f61-280b98178fff