[archiso] Use dm-snapshot instead of aufs2 (A.K.A. "The Big Commit")

* Use device mapper + snapshot module, instead union layer filesystem.
  * A block-level approach vs vfs-level.
  * No more unofficial (Linux) things.
  * More memory is needed.
* Refactor mkarchiso.
* Refactor hooks/archiso.
* Fix install/archiso_pxe_nbd
  (due recent change in mkinitcpio-0.6.15 on checked_modules()/all_modules())
  [Thanks Dave for the improved workaround]
* New configs/releng to build official images.
  * Works with a Bash script instead of Makefile.
    (better control and easy to maintain)
* Remove configs/syslinux-iso.
* Remove archiso2dual script. Integrate functionality in configs/releng.
* New configs/baseline to build the most basic live medium or use as template.
* New README (draft). [Thanks Dieter for fixing english grammar]

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

1 files changed, 6 insertions, 0 deletions

diff --git a/configs/releng/root-image/etc/pam.d/su b/configs/releng/root-image/etc/pam.d/su
new file mode 100644
index 0000000..a291042
--- /dev/null
+++ b/configs/releng/root-image/etc/pam.d/su
@@ -0,0 +1,6 @@
+#%PAM-1.0
+auth		sufficient	pam_rootok.so
+auth		sufficient	pam_wheel.so trust use_uid
+auth		required	pam_unix.so
+account		required	pam_unix.so
+session		required	pam_unix.so