Merge pull request #359 from mtomaschewski/tuntap

ifconfig: fixed to close tun/tap device descriptor
Solution to: bnc#889326
Merge pull request #358 from mtomaschewski/wait-for-interfaces

ifup/ifreload/nanny: use wait for interfaces timeout (bnc#888323)
fsm: Do not display success note if worker not started
Merge pull request #360 from pwieczorkiewicz/success_note

fsm: Do not display success note if worker not started
util: Add on/off to ni_parse_boolean()
xml: Add const parameter to *_is_empty functions
bridge: Add ni_bridge_waittime_from_xml()
fsm: Change default worker timeout to 30s
fsm: Add ni_ifworker_extra_waittime_from_xml()
fsm: Add ni_fsm_find_max_timeout()
ifdown: Calculate max workers timeout
ifup: Calculate max workers timeout
ifreload: Calculate max workers timeout
fsm: No default worker_timeout
Merge pull request #361 from pwieczorkiewicz/timeout
Merge branch 'master' into testing