make curl max_timeout variable with env.
make curl max_timeout variable with env.

tomwolfe/heroku-buildpack-gsl-ruby,ndbroadbent/heroku-buildpack-turbo-sprockets,Jonty/ruby-buildpack,packetmonkey/heroku-buildpack-ruby,Git-Host/prelang-buildpack,gbenedict/heroku-buildpack-ruby,teodor-pripoae/heroku-buildpack-ruby,DigitalInnovation/heroku-buildpack-mslabs,engineyard/heroku-buildpack-ruby,qnyp/heroku-buildpack-ruby-bower,shuber/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,vhx/heroku-buildpack,tenjikinc/heroku-buildpack-ruby,fcruxen/ruby-buildpack,dleavitt/heroku-buildpack-ruby,DigitalInnovation/heroku-buildpack-mslabs,codykrieger/heroku-buildpack-jekyll,schu/buildpack-testing,crdschurch/heroku-buildpack-ruby,sky-uk/ruby-buildpack,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,Jonty/ruby-buildpack,stolt45/heroku-buildpack-ruby-with-sqlite3,zoomer/heroku-buildpack-ruby-bower,moneyadviceservice/heroku-buildpack-ruby-bowndler,mattwalters/heroku-buildpack-ruby,bellycard/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,bwaite-jaroop/heroku-buildpack-ruby,qstream/heroku-buildpack-ruby,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,shuber/heroku-buildpack-ruby,jonasoberschweiber/heroku-buildpack-ruby,dtao/teeny-buildpack,schu/buildpack-testing,anay/buildpack-ruby-with-oracle-jdk,ibmdb/db2rubybuildpack,0x00evil/heroku-buildpack-ruby,hpcloud/ruby-buildpack,rowanoulton/heroku-buildpack-ruby,DyegoCosta/heroku-buildpack-ruby,wakermahmud/heroku-buildpack-jekyll,hellojustin/heroku-buildpack-custom-ruby,reesio/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,zunda/heroku-buildpack-ruby,sky-uk/ruby-buildpack,Dim25/heroku-buildpack-ruby-GSL,dtao/teeny-buildpack,heroku/heroku-buildpack-ruby,swipesense/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,Dim25/heroku-buildpack-ruby-GSL,redhotvengeance/heroku-buildpack-deep-thought,diasks2/heroku-buildpack-mecab,dtao/deft-buildpack-ruby,makifund/heroku-buildpack-ruby,rvizza/heroku-buildpack-gsl-ruby,d-reinhold/cf-buildpack-ruby,awebneck/heroku-buildpack-canvas,cloudn/buildpack-ruby,DouglasAllen/heroku-buildpack-ruby,beydogan/ruby-buildpack,tdenovan/heroku-buildpack-ruby,dlorson/gentle-buildpack,Git-Host/prelang-buildpack,donnykurnia/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,blueapron/heroku-buildpack-ruby,mperejda/heroku-buildpack-ruby,ltrademark/heroku-buildpack-ruby,lyoshenka/heroku-buildpack-ruby-jekyll,cmaggard/heroku-buildpack-turbo-sprockets,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,scottatron/moc-buildpack,mattmanning/heroku-buildpack-ruby-jekyll,sky-uk/help-heroku-buildpack,reesio/heroku-buildpack-ruby,bskyb-commerce/ruby-buildpack,erintherad/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,makifund/heroku-buildpack-ruby,tomwolfe/heroku-buildpack-gsl-ruby,CPPWind/ruby-buildpack,hatofmonkeys/ruby-testing-buildpack,jayshreeanand/heroku-buildpack-ruby,jayshreeanand/heroku-buildpack-ruby,jumptvs/BP_Ruby,HYPERHYPER/heroku-buildpack-ruby,catalyzeio/buildpack-ruby,space150/heroku-buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk-new,instacart/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,codykrieger/heroku-buildpack-jekyll,hatofmonkeys/ruby-testing-buildpack,Jonty/ruby-buildpack,pilotcreative/heroku-buildpack-ruby,dtao/deft-buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,takii/heroku-buildpack-ruby,rowanoulton/heroku-buildpack-ruby,schu/heroku-buildpack-ruby,ibmdb/db2rubybuildpack,qnyp/heroku-buildpack-ruby-bower,dieze/heroku-buildpack-ruby-hooks,redhotvengeance/heroku-buildpack-deep-thought,Genius/heroku-buildpack-ruby,electricobjects/heroku-buildpack-ruby,zoomer/heroku-buildpack-ruby-bower,KoanHealth/heroku-buildpack-marvin-setup,lyoshenka/heroku-buildpack-ruby-jekyll,mrhenry/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,righi/instacart-heroku-buildpack,hpcloud/ruby-buildpack,wakermahmud/heroku-buildpack-jekyll,daltonrenaldo/heroku-buildpack-ruby,jasonlevens/heroku-buildpack-ruby,Altoros/ruby-buildpack,Micka33/heroku-buildpack-ruby-liblua,Altoros/ruby-buildpack,cloudControl/buildpack-ruby,bskyb-commerce/ruby-buildpack,fcruxen/ruby-buildpack,tenjikinc/heroku-buildpack-ruby,derrek/heroku-buildpack-ruby,pilotcreative/heroku-buildpack-ruby,gls1/heroku-buildpack-ruby-pdftk,hixi/heroku-buildpack-ruby,mrhenry/heroku-buildpack-ruby,takii/db2rubybuildpack,anay/buildpack-ruby-with-oracle-jdk,leonardykris/mos-ruby-buildpack,iamjarvo/ruby-buildpack,ndbroadbent/heroku-buildpack-turbo-sprockets,zunda/heroku-buildpack-ruby,musicglue/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,dlorson/gentle-buildpack,ablease/custom-buildpack,space150/heroku-buildpack-ruby,ChefSteps/heroku-buildpack-ruby,ericboehs/heroku-buildpack-ruby,cloudn/buildpack-ruby,jasonlevens/heroku-buildpack-ruby,recursecenter/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,barakav/heroku-buildpack-ruby,fgbreel/heroku-buildpack-ruby,amaltson/heroku-buildpack-ruby,takii/db2rubybuildpack,ericroberts/heroku-buildpack-ruby,icelab/heroku-buildpack-ruby,guidance-guarantee-programme/heroku-buildpack-princexml-old,tpope/heroku-buildpack-ruby-tpope,packetmonkey/heroku-buildpack-ruby,bskyb-commerce/help-heroku-buildpack,zidekmat/buildpack-ruby,cmaggard/heroku-buildpack-turbo-sprockets,ibmdb/db2rubybuildpack,fcruxen/ruby-buildpack,gls1/heroku-buildpack-ruby-pdftk-new,michaelphines/alexa-nest,vhx/heroku-buildpack,aarongray/heroku-buildpack-ruby,jumptvs/BP_Ruby,Jonty/ruby-buildpack,Scalingo/ruby-buildpack,sky-uk/help-heroku-buildpack,d-reinhold/cf-buildpack-ruby,dieze/heroku-buildpack-ruby-hooks,ablease/custom-buildpack,daltonrenaldo/heroku-buildpack-ruby,d-reinhold/cf-buildpack-ruby,CPPWind/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,stefansundin/heroku-buildpack-ruby,jgable/buildpack-ruby-rack-setup-tasks,stefansundin/heroku-buildpack-ruby,jumptvs/BP_Ruby,sky-uk/ruby-buildpack,HYPERHYPER/heroku-buildpack-ruby,takii/heroku-buildpack-ruby,engineyard/heroku-buildpack-ruby,cloudControl/buildpack-ruby,dleavitt/heroku-buildpack-ruby,allomov/fat-free-heroku-buildpack-ruby,DouglasAllen/heroku-buildpack-ruby,pietrop/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,fgbreel/heroku-buildpack-ruby,bskyb-commerce/ruby-buildpack,pkgr/heroku-buildpack-ruby,tdenovan/heroku-buildpack-ruby,ilpoldo/heroku-buildpack-ruby,ilpoldo/heroku-buildpack-ruby,cordata/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,ltrademark/heroku-buildpack-ruby,qstream/heroku-buildpack-ruby,mattmanning/heroku-buildpack-ruby-jekyll,cordata/heroku-buildpack-ruby,gbenedict/heroku-buildpack-ruby,mperejda/heroku-buildpack-ruby,takii/db2rubybuildpack,rvizza/heroku-buildpack-gsl-ruby,simonnordberg/heroku-buildpack-ruby,catalyzeio/buildpack-ruby,ablease/custom-buildpack,Altoros/ruby-buildpack,electricobjects/heroku-buildpack-ruby,KoanHealth/heroku-buildpack-marvin-setup,hatofmonkeys/ruby-testing-buildpack,tpope/heroku-buildpack-ruby-tpope,jonasoberschweiber/heroku-buildpack-ruby,zidekmat/buildpack-ruby,ascot21/heroku-buildpack-turbo-sprockets,hpcloud/ruby-buildpack,allomov/fat-free-heroku-buildpack-ruby,samfrench/heroku-buildpack-ruby,takii/db2rubybuildpack,swipesense/heroku-buildpack-ruby,teodor-pripoae/heroku-buildpack-ruby,icelab/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,hixi/heroku-buildpack-ruby,samfrench/heroku-buildpack-ruby,ericboehs/heroku-buildpack-ruby,jonseaberg/heroku-buildpack-turbo-sprockets,donnykurnia/heroku-buildpack-ruby,sstelfox/buildpack-ruby,bskyb-commerce/ruby-buildpack,mattwalters/heroku-buildpack-ruby,DyegoCosta/heroku-buildpack-ruby,mintybit/heroku-buildpack-ruby,jumptvs/BP_Ruby,0x00evil/heroku-buildpack-ruby,jgable/buildpack-ruby-rack-setup-tasks,heroku/heroku-buildpack-ruby,ascot21/heroku-buildpack-turbo-sprockets,sstelfox/buildpack-ruby,righi/instacart-heroku-buildpack,CPPWind/ruby-buildpack,guidance-guarantee-programme/heroku-buildpack-princexml-old,fcruxen/ruby-buildpack,CPPWind/ruby-buildpack,derrek/heroku-buildpack-ruby,trumaker/heroku-buildpack-turbo-sprockets,cloudn/buildpack-ruby,orenyk/heroku-buildpack-ruby,stolt45/heroku-buildpack-ruby-with-sqlite3,ruby/heroku-buildpack-www-ruby-lang,hellojustin/heroku-buildpack-custom-ruby,bwaite-jaroop/heroku-buildpack-ruby,mintybit/heroku-buildpack-ruby,ericroberts/heroku-buildpack-ruby,simonnordberg/heroku-buildpack-ruby,bskyb-commerce/help-heroku-buildpack,Nedomas/heroku-buildpack-ruby-minus-node-with-node-paths,moneyadviceservice/heroku-buildpack-ruby-bowndler,Scalingo/ruby-buildpack,erintherad/heroku-buildpack-ruby,aarongray/heroku-buildpack-ruby,orlando/heroku-buildpack-ruby,musicglue/heroku-buildpack-ruby,Micka33/heroku-buildpack-ruby-liblua,bellycard/heroku-buildpack-ruby,michaelphines/alexa-nest,orenyk/heroku-buildpack-ruby,sky-uk/ruby-buildpack,diasks2/heroku-buildpack-mecab,beydogan/ruby-buildpack,amaltson/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,scottatron/moc-buildpack,cloudn/buildpack-ruby,iamjarvo/ruby-buildpack,pkgr/heroku-buildpack-ruby,ChefSteps/heroku-buildpack-ruby,iamjarvo/ruby-buildpack,awebneck/heroku-buildpack-canvas,hpcloud/ruby-buildpack,crdschurch/heroku-buildpack-ruby,Altoros/ruby-buildpack,trumaker/heroku-buildpack-turbo-sprockets,pietrop/heroku-buildpack-ruby,ablease/custom-buildpack,barakav/heroku-buildpack-ruby,blueapron/heroku-buildpack-ruby,recursecenter/heroku-buildpack-ruby,leonardykris/mos-ruby-buildpack,gls1/heroku-buildpack-ruby-pdftk,schu/heroku-buildpack-ruby,orlando/heroku-buildpack-ruby,Genius/heroku-buildpack-ruby