Merge pull request #231 from forumbyr/master

fix bug: max concurrent count problem.
Merge pull request #232 from wade1012/dev

fix secureDNS == secureDns
Merge pull request #233 from wade1012/dev

fix errorMessageBug
modify log conf:add time.
Merge remote-tracking branch 'cnnic/dev'
Merge pull request #234 from forumbyr/master

modify log conf:add time.
fix bug:concurrent query count error
Merge pull request #239 from forumbyr/master

fix bug:concurrent query count error
fix bug:concurrent query count error
Merge pull request #241 from forumbyr/master

fix bug:concurrent query count error
Merge pull request #2 from cnnic/dev

Dev