fix unit test problem.
Merge remote-tracking branch 'origin/master'
Merge pull request #170 from warmdawn/dev

fix bug
Merge remote-tracking branch 'cnnic/dev' into meok
Merge pull request #171 from warmdawn/dev

merge Network to IP
entity search
fix merge bug;
entity search.
Merge pull request #172 from forumbyr/master

fix merge bug; entity search.
regex for x.x.x.ip6.arpa
Merge remote-tracking branch 'cnnic/dev' into meok