base/init.sh: ignore exclamation mark for kmod static-nodes

newer versions add an exclamation mark for the type, to mark it to be
created on boot only.
dracut.sh: add $tmpfilesdir to install files to /usr/lib/tmpfiles.d
do not symlink /var/log to /run/log

some programs e.g. systemd-journald expect a directory in /var/log as
the marker to do some actions. Here journald tries to flush
/run/log/journal to /var/log/journal, if the directory is seen.

/var/log is now a symlink to /run/initramfs/log.
cms/cms-write-ifcfg.sh: turn SUBCHANNELS into lowercase