Fix isset call for ipxe stuff.  Fix the mainmenu error thrown for line 70 index.php.  Fix multicast issues in rebooting host once complete.  Fix multicast checkin to checkin the jobs properly.


git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@1806 71f96598-fa45-0410-b640-bcd6f8691b32