[PATCH] multiple patches

Hi all, 1) Further improvement to buildiso/netboot; it now uses the recently added management interface property for proper interface setup. IP to mac address resolution for the ksdevice/netdevice keyword was re-added again. https://github.com/jmaas/cobbler/commit/092f17511267e6cb0fd2665dbae95c9e3... (ooops) https://github.com/jmaas/cobbler/commit/0588a5cf37befe116c93692d868087683... 2) Remove default RedHat specific kernel_options from /etc/cobbler/settings. Set them on a RedHat breed distro instead. https://github.com/jmaas/cobbler/commit/1d473492979028a3fe3be431634edba7f... 3) Fix an exception in buildiso when called from the webinterface. https://github.com/jmaas/cobbler/commit/00e1b87b450c484de5a55c93528522ee4... 4) New feature, now build a boot ISO for selected systems from the webinterface (batch actions) https://github.com/jmaas/cobbler/commit/8cd76a2d5c2a645e8c2a5254d557bf4f5... Grtz, Jörgen Maas