Make RAILS_* give deprecation warning just once
Make RAILS_* give deprecation warning just once

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