main/openrc: support rc_verbose variable in the networking service

From the default OpenRC configuration file:

	# If you want verbose output for OpenRC, set this to yes. If you want
	# verbose output for service foo only, set it to yes in /etc/conf.d/foo.
	#rc_verbose=no

The `rc_verbose` variable is also supported by other services, e.g.
`/etc/init.d/local`. The setting is activated by default to remain
backwards compatible but can be disabled if desired.
Status Job ID Name Coverage
  Lint
failed #45612
x86_64 docker-alpine allowed to fail
lint

00:02:59

 
  Build
passed #45617
aarch64 ci-build docker-alpine
build-aarch64

00:01:51

passed #45618
armv7 ci-build docker-alpine
build-armv7

00:01:58

passed #45616
ppc64le ci-build docker-alpine
build-ppc64le

00:04:16

passed #45885
docker-alpine ci-build s390x
build-s390x

00:00:30

passed #45614
x86 ci-build docker-alpine
build-x86

00:01:25

passed #45613
x86_64 ci-build docker-alpine
build-x86_64

00:01:34

failed #45615
s390x ci-build docker-alpine
build-s390x

01:00:00

 
Name Stage Failure
failed
lint Lint
No job log