- interfaces with no IPv4 address would cause a render failure
- repair if-clause needed for interfaces with only IPv4 addresses
Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>
Detect which interfaces belong to which zones, and configure firewalld
accordingly.
Backend zone is currently only prepared and yet to be tested and
enabled.
Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>