mk-s390-cdboot has stopped working because the kernel outgrew the
hard-coded offset it used when creating cdboot.img. IBM now has a script
in s390utils that can do the same thing so use the upstream script
instead.
This drops mk-s390-cdboot script, switches the s390 templates to use
mk-s390image from s390utils.
It adds @ROOT@ to cdboot.prm, and sets inst.stage2 so that the installer
image will be found when booting the iso.
Related: rhbz#1892404
Resolves: rhbz#1382611
The kernel messages will be read from journal so don't use additional imlkog
module to read them duplicitly.
Fixup of
commit 3eca8a0425
Related: rhbz#1369439
Keep it same as in RHEL 7.2. They increase the size of the /tmp/syslog file
from ~280K to ~1M, and can be obtained from journal if needed.
Resolves: rhbz#1369439
Rsyslogd used to read messages from /dev/log together with systemd-journald
which resulted in NetworkManager messages not being passed to syslog due to a
race condition during starting NetworkManager and rsyslogd service. So use
imjournal rsyslog plugin that picks messages from journald instead of using the
/dev/log socket. Same as regular RHEL 7 system.
