Add some useful comments to rackup config
Add some useful comments to rackup config

prathamesh-sonpatki/rails,kaspth/rails,schuetzm/rails,mathieujobin/reduced-rails-for-travis,vipulnsward/rails,samphilipd/rails,marklocklear/rails,brchristian/rails,bogdanvlviv/rails,sergey-alekseev/rails,mathieujobin/reduced-rails-for-travis,palkan/rails,lucasmazza/rails,kddeisz/rails,kmcphillips/rails,bradleypriest/rails,arjes/rails,elfassy/rails,odedniv/rails,lcreid/rails,rails/rails,repinel/rails,kenta-s/rails,Vasfed/rails,pschambacher/rails,vipulnsward/rails,mohitnatoo/rails,mtsmfm/railstest,flanger001/rails,richseviora/rails,MichaelSp/rails,Vasfed/rails,Stellenticket/rails,gfvcastro/rails,yalab/rails,kirs/rails-1,arunagw/rails,illacceptanything/illacceptanything,prathamesh-sonpatki/rails,Edouard-chin/rails,jeremy/rails,deraru/rails,illacceptanything/illacceptanything,pschambacher/rails,MichaelSp/rails,printercu/rails,untidy-hair/rails,kddeisz/rails,stefanmb/rails,iainbeeston/rails,coreyward/rails,ledestin/rails,iainbeeston/rails,deraru/rails,bolek/rails,tgxworld/rails,fabianoleittes/rails,notapatch/rails,kaspth/rails,joonyou/rails,tijwelch/rails,Erol/rails,xlymian/rails,shioyama/rails,mechanicles/rails,kmcphillips/rails,lcreid/rails,tgxworld/rails,alecspopa/rails,gauravtiwari/rails,Envek/rails,rafaelfranca/omg-rails,georgeclaghorn/rails,hanystudy/rails,riseshia/railsguides.kr,riseshia/railsguides.kr,arjes/rails,rbhitchcock/rails,illacceptanything/illacceptanything,koic/rails,printercu/rails,illacceptanything/illacceptanything,mijoharas/rails,MSP-Greg/rails,gauravtiwari/rails,aditya-kapoor/rails,88rabbit/newRails,yasslab/railsguides.jp,illacceptanything/illacceptanything,yalab/rails,elfassy/rails,fabianoleittes/rails,yhirano55/rails,richseviora/rails,kmayer/rails,BlakeWilliams/rails,prathamesh-sonpatki/rails,Erol/rails,tjschuck/rails,schuetzm/rails,maicher/rails,iainbeeston/rails,aditya-kapoor/rails,Edouard-chin/rails,repinel/rails,georgeclaghorn/rails,lucasmazza/rails,yawboakye/rails,lcreid/rails,notapatch/rails,betesh/rails,riseshia/railsguides.kr,mtsmfm/rails,yahonda/rails,Envek/rails,mohitnatoo/rails,arjes/rails,yasslab/railsguides.jp,Edouard-chin/rails,jeremy/rails,xlymian/rails,utilum/rails,Vasfed/rails,ngpestelos/rails,shioyama/rails,yhirano55/rails,rafaelfranca/omg-rails,vassilevsky/rails,voray/rails,sergey-alekseev/rails,esparta/rails,joonyou/rails,sergey-alekseev/rails,aditya-kapoor/rails,yasslab/railsguides.jp,matrinox/rails,mathieujobin/reduced-rails-for-travis,88rabbit/newRails,repinel/rails,koic/rails,sealocal/rails,mtsmfm/railstest,utilum/rails,Spin42/rails,kamipo/rails,arunagw/rails,MSP-Greg/rails,arunagw/rails,eileencodes/rails,bradleypriest/rails,tgxworld/rails,shioyama/rails,88rabbit/newRails,illacceptanything/illacceptanything,lcreid/rails,assain/rails,felipecvo/rails,yhirano55/rails,BlakeWilliams/rails,alecspopa/rails,voray/rails,gavingmiller/rails,georgeclaghorn/rails,bogdanvlviv/rails,rails/rails,stefanmb/rails,yasslab/railsguides.jp,gcourtemanche/rails,yawboakye/rails,notapatch/rails,travisofthenorth/rails,Spin42/rails,koic/rails,illacceptanything/illacceptanything,joonyou/rails,hanystudy/rails,betesh/rails,kddeisz/rails,gavingmiller/rails,BlakeWilliams/rails,shioyama/rails,mtsmfm/rails,tgxworld/rails,schuetzm/rails,tijwelch/rails,notapatch/rails,samphilipd/rails,utilum/rails,palkan/rails,kamipo/rails,baerjam/rails,coreyward/rails,flanger001/rails,Erol/rails,vassilevsky/rails,kmayer/rails,felipecvo/rails,palkan/rails,rossta/rails,arunagw/rails,ttanimichi/rails,ngpestelos/rails,coreyward/rails,starknx/rails,betesh/rails,amoody2108/TechForJustice,yawboakye/rails,marklocklear/rails,odedniv/rails,MSP-Greg/rails,matrinox/rails,vipulnsward/rails,yalab/rails,ttanimichi/rails,maicher/rails,bradleypriest/rails,gfvcastro/rails,xlymian/rails,flanger001/rails,repinel/rails,utilum/rails,yawboakye/rails,elfassy/rails,assain/rails,gcourtemanche/rails,untidy-hair/rails,riseshia/railsguides.kr,untidy-hair/rails,Stellenticket/rails,pvalena/rails,Stellenticket/rails,kirs/rails-1,kirs/rails-1,kachick/rails,tjschuck/rails,kmcphillips/rails,mohitnatoo/rails,esparta/rails,marklocklear/rails,gavingmiller/rails,travisofthenorth/rails,Edouard-chin/rails,pvalena/rails,pschambacher/rails,mechanicles/rails,Sen-Zhang/rails,odedniv/rails,kddeisz/rails,Vasfed/rails,stefanmb/rails,brchristian/rails,bogdanvlviv/rails,rossta/rails,kamipo/rails,ledestin/rails,eileencodes/rails,mechanicles/rails,MichaelSp/rails,vassilevsky/rails,baerjam/rails,gcourtemanche/rails,mtsmfm/rails,sealocal/rails,flanger001/rails,starknx/rails,rbhitchcock/rails,pvalena/rails,rails/rails,rbhitchcock/rails,mechanicles/rails,tjschuck/rails,bolek/rails,rossta/rails,travisofthenorth/rails,jeremy/rails,illacceptanything/illacceptanything,kachick/rails,amoody2108/TechForJustice,gauravtiwari/rails,prathamesh-sonpatki/rails,alecspopa/rails,Envek/rails,Erol/rails,kaspth/rails,rails/rails,betesh/rails,ledestin/rails,baerjam/rails,travisofthenorth/rails,sealocal/rails,EmmaB/rails-1,Spin42/rails,illacceptanything/illacceptanything,maicher/rails,tjschuck/rails,illacceptanything/illacceptanything,illacceptanything/illacceptanything,samphilipd/rails,matrinox/rails,tijwelch/rails,palkan/rails,gfvcastro/rails,kmcphillips/rails,kenta-s/rails,yahonda/rails,assain/rails,joonyou/rails,assain/rails,untidy-hair/rails,eileencodes/rails,deraru/rails,printercu/rails,yahonda/rails,kachick/rails,BlakeWilliams/rails,illacceptanything/illacceptanything,MSP-Greg/rails,esparta/rails,rafaelfranca/omg-rails,illacceptanything/illacceptanything,pvalena/rails,EmmaB/rails-1,gfvcastro/rails,mijoharas/rails,yahonda/rails,Sen-Zhang/rails,iainbeeston/rails,schuetzm/rails,mohitnatoo/rails,ngpestelos/rails,EmmaB/rails-1,baerjam/rails,georgeclaghorn/rails,Envek/rails,deraru/rails,illacceptanything/illacceptanything,fabianoleittes/rails,bogdanvlviv/rails,starknx/rails,aditya-kapoor/rails,bolek/rails,kenta-s/rails,fabianoleittes/rails,mijoharas/rails,richseviora/rails,kmayer/rails,Stellenticket/rails,esparta/rails,illacceptanything/illacceptanything,ttanimichi/rails,printercu/rails,amoody2108/TechForJustice,lucasmazza/rails,yalab/rails,voray/rails,Sen-Zhang/rails,yhirano55/rails,hanystudy/rails,eileencodes/rails,brchristian/rails,vipulnsward/rails,felipecvo/rails,jeremy/rails,mtsmfm/railstest