Enhance ipv4 ipv6 handling

[engelmi]

This PR is a follow-up of #353 and refactors the IPv4/IPv6 handling as well as adds setting the assembled IPv6 orchestrator address.

Still missing (and will be added in this PR):

• integration test for domain name resolving

[dougsland]

in general LGTM just small comments. Please let me know when is ready for Tests.

[dougsland]

Also, if possible, could you please squash the commits? Would be easier to review :)

[dougsland]

make test is failing on my env but looks like it's something local, CI on github just worked:

test:         get_address_test
start time:   18:41:56
duration:     0.02s
result:       exit status 1
command:      MALLOC_PERTURB_=11 /root/hirte/builddir/src/libhirte/test/common/network/get_address_test
----------------------------------- stdout -----------------------------------
FAILED: get_address('localhost') - Expected 127.0.0.1, but got ::1
==============================================================================

# cat /etc/hosts
127.0.0.1	localhost localhost.localdomain localhost4 localhost4.localdomain4
::1	localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.122.151	devmaster
192.168.122.104	devmaster
10.90.0.1	host.containers.internal
fd00::1:8:7	control control
10.90.0.7	control control

# ping localhost
PING localhost(localhost (::1)) 56 data bytes
64 bytes from localhost (::1): icmp_seq=1 ttl=64 time=0.023 ms
64 bytes from localhost (::1): icmp_seq=2 ttl=64 time=0.046 ms

For the record: I am using a dualstack env.

[dougsland]

We can handle these minor changes in a different patch, it's getting big here.

[engelmi]

make test is failing on my env but looks like it's something local, CI on github just worked:

test:         get_address_test
start time:   18:41:56
duration:     0.02s
result:       exit status 1
command:      MALLOC_PERTURB_=11 /root/hirte/builddir/src/libhirte/test/common/network/get_address_test
----------------------------------- stdout -----------------------------------
FAILED: get_address('localhost') - Expected 127.0.0.1, but got ::1
==============================================================================

# cat /etc/hosts
127.0.0.1	localhost localhost.localdomain localhost4 localhost4.localdomain4
::1	localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.122.151	devmaster
192.168.122.104	devmaster
10.90.0.1	host.containers.internal
fd00::1:8:7	control control
10.90.0.7	control control

# ping localhost
PING localhost(localhost (::1)) 56 data bytes
64 bytes from localhost (::1): icmp_seq=1 ttl=64 time=0.023 ms
64 bytes from localhost (::1): icmp_seq=2 ttl=64 time=0.046 ms

For the record: I am using a dualstack env.

This actually broke the COPR build: https://copr.fedorainfracloud.org/coprs/mperina/hirte-snapshot/build/6105555/
PR to fix the failing test (make it independent if domain resolves to ipv4 or ipv6): #366