bump 3dt
bump 3dt

add header "Connection: close"
https://github.com/dcos/3dt/pull/70
http://craigwickesser.com/2015/01/golang-http-to-many-open-files/

vishnu2kmohan/dcos,dcos/dcos,GoelDeepak/dcos,surdy/dcos,mellenburg/dcos,mesosphere-mergebot/dcos,GoelDeepak/dcos,BenWhitehead/dcos,jeid64/dcos,jeid64/dcos,vishnu2kmohan/dcos,asridharan/dcos,asridharan/dcos,mnaboka/dcos,GoelDeepak/dcos,branden/dcos,mesosphere-mergebot/mergebot-test-dcos,dcos/dcos,kensipe/dcos,BenWhitehead/dcos,lingmann/dcos,BenWhitehead/dcos,mnaboka/dcos,dcos/dcos,jeid64/dcos,kensipe/dcos,mellenburg/dcos,dcos/dcos,darkonie/dcos,asridharan/dcos,xinxian0458/dcos,amitaekbote/dcos,lingmann/dcos,darkonie/dcos,BenWhitehead/dcos,jeid64/dcos,xinxian0458/dcos,branden/dcos,vishnu2kmohan/dcos,darkonie/dcos,mnaboka/dcos,GoelDeepak/dcos,mesosphere-mergebot/dcos,darkonie/dcos,mnaboka/dcos,amitaekbote/dcos,mellenburg/dcos,branden/dcos,surdy/dcos,lingmann/dcos,dcos/dcos,mellenburg/dcos,xinxian0458/dcos,surdy/dcos,mesosphere-mergebot/dcos,mesosphere-mergebot/mergebot-test-dcos,vishnu2kmohan/dcos,asridharan/dcos,branden/dcos,mesosphere-mergebot/dcos,xinxian0458/dcos,amitaekbote/dcos,kensipe/dcos,darkonie/dcos,mesosphere-mergebot/mergebot-test-dcos,amitaekbote/dcos,mesosphere-mergebot/mergebot-test-dcos,surdy/dcos,lingmann/dcos,mnaboka/dcos,kensipe/dcos