Package alterator-net-functions: Information

- valid_ipv4addr: Allow 0 in last byte. (closes: #33795)

- valid_ipv4addr: Allow 255 in 2nd and 3th bytes.

- Drop unneeded line.
- Add functions for read current default route and DNS settings.
- Suppress 'broken pipe' error message.
- Add list_bridge() and list_bridge_with_cache().
- Add function for host interfaces.
- list_iface(): Skip ifaces in a bonding.
- list_eth(): Don't replace interface with bridge.
- Add init_slave_eth_iface_cache().
- tests: Add more ipv*addr tests.
- Add warning for deprecated functions.
- Remove read_iface_slaves().
- Add remove_iface_with_cache().
- Add list_vlans_for_iface() and list_vlans_for_iface_with_cache().
- iface_has_host(): Suppress find's error messages.
- Add list_vlan() and list_vlan_with_cache().
- Introduce function for work with cached data.
- next_iface(): Pass ifaces directory as argument.
- list_network(): Pass ifaces directory as second argument.
- Use list_etcnet_iface_filtered() to list interfaces.
- Use list_etcnet_iface_filtered for list_ppp().
- Add functions for filtered interfaces list.
- iface_has_host: Handle VLAN interfaces too.
- Rename read_iface_slaves -> read_iface_host_var.