util: Add ni_var_array_remove() and ni_var_array_remove_at()
xml: Add xml_node_del_attr() utility
xml: Fix functions retrieving numerical attr values
util: add "yes|no" to ni_parse_boolean()
ifstatus: Do not consider client-state in ifstatus

Rename status NOT_STARTED to UNCONFIGURED
macvlan: reduce number of linktype function calls
samples: macvtap sample configurations
Print errors in ni_dhcp4_build_message
Merge pull request #203 from kmroz/macvtap-optimize
Merge pull request #204 from olafhering/olh-bnc866993-dhcp4-renew-unicast
Cherry-picked commits from pwieczorkiewicz:client-state

Signed-off-by: Marius Tomaschewski <mt@suse.de>
Correct printing of missing options or lease
Print also ifname in ni_dhcp4_build_message
Use inet_ntop instead of inet_ntoa in ni_dhcp4_build_message
Use temporary variable for buf in ni_dhcp4_device_send_message
Renew DHCP4 lease via unicast (bnc#866993)
Merge pull request #205 from olafhering/olh-bnc866993-dhcp4-renew-unicast

Renew DHCP4 lease via unicast (bnc#866993) hotfix
dhcp4: fixed posix-tz-dbname code added to parse
README: added sample commands to build from source
version 0.5.16