installation: allow non-standard HTTP/HTTPS ports
installation: allow non-standard HTTP/HTTPS ports

* Fixes creation of Apache vhost snippets in case CFG_SITE_URL and
  CFG_SITE_SECURE_URL include port information, e.g. when one uses
  'http://localhost:8080' and 'https://localhost:8443'.

tiborsimko/invenio,inveniosoftware/invenio,tiborsimko/invenio,inveniosoftware/invenio