Added X-Powered-By, remove Connects "Server" header field
Added X-Powered-By, remove Connects "Server" header field

potentially a security issue... I told Tim not to add this :p,
so for now we just hide it in Express until I have a chance to remove
it from Connect, at least the versions.

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