Added res.send() Content-Type precedence test
Added res.send() Content-Type precedence test

ci-test2/express,ifraixedes/express,mimaidms/express,gnowoel/express,ahdinosaur/express,Matrixbirds/express,listepo/express,Flip120/express,VegeChou/express,vinodhalaharvi/express,qq645381995/express,Ju2ender/express,nodejs-camp/booklog-Zak,isaacs/express,YR/express,evilboss/express,udhayam/express,sarvex/express,heicx/express,ahdinosaur/express,dreamingblackcat/express,cflynn07/express,robomc/express,micha149/express,JulyZhu/express,mcanthony/express,sarvex/express,Ivanwangcy/express,fineday32/express,r14r/fork_express_master,srichatala/express,auth0/express,corporateanon/express,methuz/express,nodejs-camp/booklog-tonebeta-update,qitianchan/express,Haru1990/express,saisai/express,abdulhannanali/express,flomotlik/express,lian774739140/express,Kevnz/express,MoraLin/mora-test,nodejs-camp/booklog-polo,wtony/express,nodejs-camp/booklog-polo,rupanjanbaidya/express,RickyDan/express,TestingCI/express,chrisinajar/express,sibura/express,jenia0jenia/express,featurist/express,auth0/express,philxia/ex-tst-framework,XueQian/express,grigorkh/express,tfe/express,fanzetao/express,topaxi/express,KodkodGates/express,junxiong/express,vnglst/express,wtony/express,nodejs-camp/booklog-ben,nbeydoon/express,danielrohers/express,xtidt/express,juanpastas/express,dotnetCarpenter/express,lemelon/express,vidyar/express,devgeniem/express,fuse-mars/express,Ivanwangcy/express,KodkodGates/express,Ju2ender/express,v10258/express,bercanozcan/express,grigorkh/express,pathirana/express,Talkyunyun/express,junxiong/express,svnh/express,buildsample/express,andrejewski/express,Lexine/express,xiaofuzi/express,featurist/express,gnowoel/express,mimaidms/express,hanweifish/express,nodejs-camp/booklog-linkchen,philxia/ex-tst-framework,lian774739140/express,frootloops/express,Riokai/express,hpcslag/express,awronka/express,ericlu88/express,aifeld/express,mikewesthad/express,1amageek/express,pshomov/express,gdeividas/express,isaacs/express,ci-test2/express,wtony/express,fanzetao/express,codeforgeek/express,chuym/express,coreypnorris/express,angelsanz/express,jimmykuo/express,dgofman/express,robomc/express,samuelcastro/express,expressjs/express,kunalpict/express,vidyar/express,ifraixedes/express,blakeembrey/express,PUSEN/express,tjmehta/express,hanqingnan/express,jenalgit/express,dongseop/express,jimmykuo/express,emvici/emvici-reqres-tify,hdngr/express,countdracular/express,hanqingnan/express,youprofit/express,dongooo/express,michaeljunlove/express,svnh/express,CrazySherman/express,dongooo/express,abhi3/express,nodejs-camp/booklog-s890506,dreamingblackcat/express,RanadeepPolavarapu/express,nathan818fr/express,evilboss/express,blairzhang/express,r14r-work/fork_express_master,WebStyle/express,Talkyunyun/express,hightechweb/express,hanweifish/express,jinghuizhai/express,michaeljunlove/express,countdracular/express,nodejs-camp/booklog-leo,youprofit/express,vinodhalaharvi/express,luxe-eng/valet-express.express,qitianchan/express,stoskov/express,blairzhang/express,jenia0jenia/express,srichatala/express,stevemao/express,benshiue/booklog-ben,kylezhang/express,drzorm/express,hdngr/express,pstrike/express,rgrove/express,blainsmith/express,nodejs-camp/booklog-ansaga,nodejs-camp/booklog-linkchen,swarajgiri/express,tjmehta/express,shanawarkhan/express,gretac/express,llwanghong/express,nbeydoon/express,FernAbby/express,micha149/express,strongloop/express,bjrmatos/express,LestaD/express,buildsample/express,gretac/express,1amageek/express,stewartml/express,dsupera13/express,jenalgit/express,stewartml/express,za-creature/express,kubrickology/express,abhi3/express,shanawarkhan/express,nodejs-camp/booklog-jollen,listepo/express,Flip120/express,philxia/ex-tst-framework,dotnetCarpenter/express,nodejs-camp/booklog-mora,aifeld/express,junxiong/express,caiocutrim/express,adjohnson916/express,kunalpict/express,jenia0jenia/express,ralic/express,chrisinajar/express,kentcdodds/express,weilixia/express,Haru1990/express,simplyianm/express,philxia/ex-tst-framework,kylezhang/express,tyler-johnson/express,simudream/express,LestaD/express,blainsmith/express,tianhengzhou/express,nodejs-camp/booklog-jason,WangCao/express,xtidt/express,MoraLin/mora-test,kunalpict/express,dgofman/express,nodejs-camp/booklog-homa,Riokai/express,jinghuizhai/express,microlv/express,topaxi/express,Riokai/express,nodejs-camp/booklog-ben,fineday32/express,pstrike/express,featurist/express,jinghuizhai/express,qq645381995/express,LestaD/express,fakedarren/express,simudream/express,luxe-eng/valet-express.express,vnglst/express,mcanthony/express,Faiz7412/express,WangCao/express,angelsanz/express,ZackBotkin/express,r14r-work/fork_express_master,xiaofuzi/express,hacksparrow/express,grigorkh/express,soyuka/express,PeterWangPo/express,abdulhannanali/express,chrisinajar/express,blakeembrey/express,supasate/express,ericlu88/express,devgeniem/express,expressjs/express,r14r/fork_express_master,neomadara/express,mikewesthad/express,luxe-eng/valet-express.express,baldurh/express,blakeembrey/express,dsupera13/express,lmtdit/express,gnowoel/express,blairzhang/express,coreypnorris/express,dafabulousteach/express,hacksparrow/express,swstack/express,maraoz/express,Eric-Vandenberg/express,lmtdit/express,maraoz/express,Kevnz/express,elkingtonmcb/express,buildsample/express,kubrickology/express,jenalgit/express,nodejs-camp/booklog-ausir,hl198181/express,evilboss/express,nodejs-camp/booklog-leo,dieuly/express,hightechweb/express,nodejs-camp/booklog-archer,tyler-johnson/express,nodejs-camp/booklog-tonebeta,BaggersIO/express,HXYNODE/express,supasate/express,topaxi/express,friederbluemle/express,vidyar/express,wesleytodd/express,XueQian/express,bercanozcan/express,flomotlik/express,v10258/express,leiqiang75/express,stevemao/express,drzorm/express,evanlucas/express,simudream/express,nodejs-camp/booklog-tonebeta,nodejs-camp/booklog-chle,stewartml/express,corporateanon/express,nodejs-camp/booklog-jollen,devgeniem/express,demohi/express,rgrove/express,nodejs-camp/booklog-s890506,dongseop/express,1verson/express,stoskov/express,thepont/express,frootloops/express,1amageek/express,btleffler/express,lmtdit/express,Faiz7412/express,smcmurray/express,tianhengzhou/express,hpcslag/express,youprofit/express,yinhe007/express,swarajgiri/express,nodejs-camp/booklog-jason,jymsy/express,weilixia/express,PUSEN/express,microlv/express,smcmurray/express,fuse-mars/express,juanpastas/express,brianloveswords/express,nodejs-camp/booklog-polo,awronka/express,saisai/express,za-creature/express,nodejs-camp/booklog-homa,adjohnson916/express,elkingtonmcb/express,fakedarren/express,jymsy/express,pathirana/express,JulyZhu/express,za-creature/express,gdeividas/express,nathan818fr/express,nodejs-camp/booklog-mora,udhayam/express,neomadara/express,svnh/express,qitianchan/express,dafabulousteach/express,vnglst/express,christopheranderson/express,swarajgiri/express,Eric-Vandenberg/express,bercanozcan/express,hl198181/express,nodejs-camp/booklog-Zak,juandav/express,benshiue/booklog-ben,codeforgeek/express,kylezhang/express,yinhe007/express,abhi3/express,samuelcastro/express,andriyl/express,caiocutrim/express,friederbluemle/express,RickyDan/express,PeterWangPo/express,frank06/express,mauricionr/express,strongloop/express,sujianping/express,nodejs-camp/booklog-ausir,Eric-Vandenberg/express,vinodhalaharvi/express,nodejs-camp/booklog-chenyou,ZackBotkin/express,hpcslag/express,FernAbby/express,kawanet/express,fakedarren/express,nodejs-camp/booklog-chle,chuym/express,angelsanz/express,rupanjanbaidya/express,corporateanon/express,bjrmatos/express,Jonekee/express,mauricionr/express,Flip120/express,wesleytodd/express,leiqiang75/express,pshomov/express,v10258/express,llwanghong/express,dongseop/express,WangCao/express,Jonekee/express,danielrohers/express,TestingCI/express,kawanet/express,stoskov/express,soyuka/express,sibura/express,TestingCI/express,methuz/express,KodkodGates/express,christopheranderson/express,BaggersIO/express,ci-test2/express,cflynn07/express,BaggersIO/express,evanlucas/express,listepo/express,YR/express,stevemao/express,friederbluemle/express,lemelon/express,btleffler/express,nodejs-camp/booklog-chenyou,Ju2ender/express,dafabulousteach/express,dreamingblackcat/express,coreypnorris/express,1verson/express,supasate/express,Lexine/express,andriyl/express,qq645381995/express,sarvex/express,dotnetCarpenter/express,nodejs-camp/booklog-ansaga,heicx/express,abdulhannanali/express,dieuly/express,CrazySherman/express,baldurh/express,nodejs-camp/booklog-archer,Faiz7412/express,kentcdodds/express,VegeChou/express,igarciaes/express,HXYNODE/express,sujianping/express,michaeljunlove/express,swstack/express,demohi/express,XueQian/express,ZackBotkin/express,WebStyle/express,andrejewski/express,RanadeepPolavarapu/express,igarciaes/express,nbeydoon/express,hdngr/express,Matrixbirds/express,xiaofuzi/express,thepont/express,simplyianm/express,smcmurray/express,ralic/express,nodejs-camp/booklog-tonebeta-update,maraoz/express,frank06/express,juandav/express