fcoe-uefi: try all FcoeBootDevice-* variables for a DevicePath

try to read the DevicePath from all FcoeBootDevice-* UEFI variables
until one has a MAC.
dracut.sh: write directly to the output file

Because we already remove the output file before writing to it, we don't
have to play games and write to a temporary file first.
Patch for Manpage

Patch corrects grub paths in the manpage for both GRUB legacy and GRUB2
Add legacy flag (-l) to lz4 and update magic number

Linux kernel does not support the new default lz4 format.

https://bugs.gentoo.org/show_bug.cgi?id=502102
Added missing quotes

See bug report at https://bugs.gentoo.org/show_bug.cgi?id=502064
systemd: add 70-uaccess.rules
Add flag to toggle hostonly cmdline storing in the initramfs

--hostonly-cmdline:
    Store kernel command line arguments needed in the initramfs

--no-hostonly-cmdline:
    Do not store kernel command line arguments needed in the initramfs
systemd/rootfs-generator.sh: generate units in /run/systemd/generator

Generate the units in /run/systemd/generator, so they are picked up by
systemd.

https://bugzilla.redhat.com/show_bug.cgi?id=1069133
https://bugzilla.redhat.com/show_bug.cgi?id=949697
ifcfg/write-ifcfg.sh: do not bind s390 to MAC if SUBCHANNELS set

If SUBCHANNELS are set, do not specify HWADDR, because the SUBCHANNELS
are the identifier for the interface.

https://bugzilla.redhat.com/show_bug.cgi?id=1056438
network/net-lib.sh:wait_for_ipv6_auto() also wait for the tentative flag

Wait until the tentative flag is cleared.

https://bugzilla.redhat.com/show_bug.cgi?id=1069263
network/dhclient-script.sh:DHCP IPv6 interface setup

configure IPv6 interface for DHCP6

https://bugzilla.redhat.com/show_bug.cgi?id=1064365