Introduce detection of z/VM or LPAR hypervisors.
If running on z/VM always try to modprobe the netiucv kernel module
Add #if/#endif to last change to net.c
Moved the check for config.net.ptp to the correct spot in the logic.
Added util_umount('/sys/hypervisor/s390'); to lxrc_end.
Merge pull request #6 from openSUSE/iucvtest

Introduce detection of z/VM or LPAR hypervisors.