[arch-releng] archiso master branch updated

[Gerardo Exequiel Pozzi]

b6df75e [archiso] Delete README.old
c2aefad [archiso] Makefile trivial fix (if configs/ already on DESTDIR)
90cfe3c [archiso] Add checksum= boot param
12e9d32 [configs/releng] Add purge_* commands
808c1a0 [configs/*] Use $script_path for "source" files.
8b2acca [configs/*] Remove custom fstab, not needed anymore.


-- 
Gerardo Exequiel Pozzi
\cos^2\alpha + \sin^2\alpha = 1