base/dracut-lib.sh: add dev_unit_name()

add helper function to convert device path to systemd unit names
crypt/parse-crypt.sh: create udev rule for systemd

Start the systemd-cryptsetup@luks-*.service for the detected crypto_LUKS
device in the initqueue, so we block in the initqueue and wait for the
password entry.
base/dracut-lib.sh:wait_for_dev()/cancel_wait_for_dev() set systemd timeouts

Set systemd unit timeouts for the devices we wait for. The systemd
default is 90 seconds, which is way too low for complicated setups.
Add missing options to manpage and --help output

https://bugzilla.redhat.com/show_bug.cgi?id=948510
TEST-50-MULTINIC: fixup test suite

qemu of the day doesn't like multicast anymore
TESTSUITE: s/i6300esbwdt/i6300esb ib700wdt/g
TEST-99-RPM: ignore rescue images