Merge pull request #155 from rhass/master

Update UBCD version to 5.3.7

src/utils.ipxe

@@ -124,8 +124,8 @@ boot
 goto utils_exit
 
 :ubcd
-set util_path mirror.sysadminguide.net/ubcd/ubcd535.iso
-set util_file ubcd535.iso
+set util_path mirror.sysadminguide.net/ubcd/ubcd537.iso
+set util_file ubcd537.iso
 goto boot_memdisk
 
 :boot_memdisk