version 0.5.20

• autoip4,dhcp4,dhcp6: fixed to create instance for supported
  devices only to save memory and avoid allocation complains due to
  packet capturing init failure
• lldp: fix infinite loops in ni_lldp_agent_update,
  disable built-in support
  (rejected fate#313671, bnc#873299)
• dhcp4: do not send hostname to server in discover (bnc#873267)
• rpm: explicit piddir,statedir,storedir in spec
• generate ChangeLog file from git while make dist