Parameterized {jailbase,jaildir}
Replaced all usages of /usr/jail with $jaildir
Explicitly fail if $os isn't FreeBSD
Removed $__type/files/ as it is pointless to have now
Updated man page
Added logic to ensure that /etc/resolv.conf exists within a jail
Replaced /var/db, /var/tmp mountpoints with /var mountpoint in jail
Added logic to ensure that every jail is bound to an interface
Modified how information is inserted into the jail's rc.conf
Added ListenAddress directive for SSHd
Updated manpage to reflect these changes
