General :: ARCH & Slackware's Bootup/mounting Process?

I was wondering if anyone can tell me what file, etc is the equivalent of ARCH's /etc/rc.sysinit? I need to know this because I am having many problems making the new nfluxos iso's for ARCH because of how ARCH now mounts stuff at bootup

due to whatever changed in udev or udisks or something else in ARCH now, when I make the system into a livecd it doublemounts everything when booting for example; output of "mount" in nfluxos with 3.4squashfs udev 151

Code:
[root@nfluxos ~]# mount
rootfs on / type rootfs (rw)
aufs on / type aufs (rw,relatime,si=4ce08f22,nowarn_perm)
none on /proc type proc (rw,relatime)
none on /sys type sysfs (rw,relatime)

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