reconnect_s390: Try to collect "blocked tasks" if we are stuck on bootup #4843
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Using "magic sysrq" within x3270 we can show "Blocked Tasks" which can helpful
in case a login is not possible. So far this approach has been done for s390x
z/VM which seems to be about the hardest platform to debug so it is most
likely most useful there.
Verification run: http://lord.arch.suse.de/tests/768#step/reconnect_s390/6
Related bug: https://bugzilla.suse.com/show_bug.cgi?id=1062771