This adds EXTLINUX, part of the SYSLINUX family of bootloaders, support to grubby. This is a purely cli version of EXTLINUX and this does not have menu support. This support would most closely resemble LILO.
--extlinux - Switch to define that you want to work on EXTLINUX
- Adds the neccisary structures to deal with EXTLINUX (struct keywordTypes extlinuxKeywords, and truct configFileInfo extlinuxConfigType)
- Small amount of other code to handle the oddities of EXTLINUX vs. other boot loaders