Added owner group and mode parameter. For all users, per sites-available directory and per sites conf
Merge pull request #373 from alkivi-sas/owner

Added owner group and mode parameter. For all users, per sites-available...
Initial Update to params for FreeBSD support

This adds the necessary changes the params class and associated
variables to support FreeBSD.
Add support for FreeBSD package installation
Update root group for wider support

The super group on many platforms is known as root, which a UID of 0.
However, on other platforms, the UID is still 0, but the group is
'wheel'.  Largely historic UNIX jargon, but suffice to say that, to
support FreeBSD and others, setting the group of '0' has the same impact
while supporting a wider range of platforms.