Dominique Martinet authored Jun 17, 2022 and Jakub Jirutka committed Jun 26, 2022

for cases other than bridges dnsmasq might need some
extra configuration step before starting

Tested with conf.d value, used for NetworkManager (if it's slow to start
it won't have time to create required dir for resolv-file, nor setup lo
if bind-interfaces is set):
```
setup_command=extra_setup
extra_setup() {
	ip a add 127.0.0.1/8 dev lo >/dev/null 2>&1
	ip a add ::1/128 dev lo >/dev/null 2>&1
	mkdir -p /run/NetworkManager
}
```