Fixed `req.is()` with charsets
Fixed `req.is()` with charsets

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