Add a new section to the manual about hiding things that a module doesn't export
Add a new section to the manual about hiding things that a module doesn't export

See Trac #9216

sdiehl/ghc,acowley/ghc,jstolarek/ghc,snoyberg/ghc,ml9951/ghc,gridaphobe/ghc,nathyong/microghc-ghc,nathyong/microghc-ghc,nathyong/microghc-ghc,shlevy/ghc,elieux/ghc,nathyong/microghc-ghc,christiaanb/ghc,ezyang/ghc,lukexi/ghc,holzensp/ghc,tjakway/ghcjvm,olsner/ghc,mcschroeder/ghc,urbanslug/ghc,sgillespie/ghc,nushio3/ghc,elieux/ghc,snoyberg/ghc,wxwxwwxxx/ghc,fmthoma/ghc,oldmanmike/ghc,spacekitteh/smcghc,mettekou/ghc,fmthoma/ghc,gcampax/ghc,mfine/ghc,holzensp/ghc,olsner/ghc,da-x/ghc,fmthoma/ghc,oldmanmike/ghc,snoyberg/ghc,gridaphobe/ghc,spacekitteh/smcghc,ml9951/ghc,bitemyapp/ghc,wxwxwwxxx/ghc,shlevy/ghc,anton-dessiatov/ghc,oldmanmike/ghc,tjakway/ghcjvm,urbanslug/ghc,mettekou/ghc,ghc-android/ghc,AlexanderPankiv/ghc,anton-dessiatov/ghc,forked-upstream-packages-for-ghcjs/ghc,gcampax/ghc,da-x/ghc,ml9951/ghc,green-haskell/ghc,christiaanb/ghc,vTurbine/ghc,snoyberg/ghc,nushio3/ghc,elieux/ghc,gridaphobe/ghc,ml9951/ghc,TomMD/ghc,jstolarek/ghc,tjakway/ghcjvm,ghc-android/ghc,mettekou/ghc,ghc-android/ghc,gridaphobe/ghc,AlexanderPankiv/ghc,da-x/ghc,nkaretnikov/ghc,nushio3/ghc,urbanslug/ghc,jstolarek/ghc,shlevy/ghc,vikraman/ghc,ml9951/ghc,vTurbine/ghc,christiaanb/ghc,mcschroeder/ghc,mettekou/ghc,GaloisInc/halvm-ghc,forked-upstream-packages-for-ghcjs/ghc,siddhanathan/ghc,mfine/ghc,AlexanderPankiv/ghc,mcschroeder/ghc,sdiehl/ghc,ml9951/ghc,nathyong/microghc-ghc,shlevy/ghc,vikraman/ghc,tibbe/ghc,urbanslug/ghc,elieux/ghc,ezyang/ghc,elieux/ghc,gcampax/ghc,nushio3/ghc,oldmanmike/ghc,ezyang/ghc,vTurbine/ghc,shlevy/ghc,gcampax/ghc,ghc-android/ghc,vikraman/ghc,spacekitteh/smcghc,vikraman/ghc,ezyang/ghc,anton-dessiatov/ghc,acowley/ghc,oldmanmike/ghc,mfine/ghc,frantisekfarka/ghc-dsi,siddhanathan/ghc,sgillespie/ghc,gridaphobe/ghc,ml9951/ghc,da-x/ghc,anton-dessiatov/ghc,mfine/ghc,sdiehl/ghc,da-x/ghc,mcschroeder/ghc,gridaphobe/ghc,AlexanderPankiv/ghc,siddhanathan/ghc,gcampax/ghc,fmthoma/ghc,nkaretnikov/ghc,sdiehl/ghc,fmthoma/ghc,mettekou/ghc,bitemyapp/ghc,lukexi/ghc,oldmanmike/ghc,TomMD/ghc,tjakway/ghcjvm,tjakway/ghcjvm,vTurbine/ghc,GaloisInc/halvm-ghc,mcschroeder/ghc,lukexi/ghc,AlexanderPankiv/ghc,nkaretnikov/ghc,acowley/ghc,christiaanb/ghc,TomMD/ghc,vikraman/ghc,elieux/ghc,wxwxwwxxx/ghc,GaloisInc/halvm-ghc,TomMD/ghc,tibbe/ghc,acowley/ghc,shlevy/ghc,nushio3/ghc,tibbe/ghc,ghc-android/ghc,snoyberg/ghc,acowley/ghc,snoyberg/ghc,GaloisInc/halvm-ghc,olsner/ghc,bitemyapp/ghc,mettekou/ghc,holzensp/ghc,AlexanderPankiv/ghc,siddhanathan/ghc,vikraman/ghc,sgillespie/ghc,wxwxwwxxx/ghc,urbanslug/ghc,mcschroeder/ghc,ghc-android/ghc,tjakway/ghcjvm,wxwxwwxxx/ghc,gcampax/ghc,forked-upstream-packages-for-ghcjs/ghc,nushio3/ghc,nkaretnikov/ghc,vTurbine/ghc,oldmanmike/ghc,mettekou/ghc,anton-dessiatov/ghc,olsner/ghc,christiaanb/ghc,urbanslug/ghc,tjakway/ghcjvm,sdiehl/ghc,christiaanb/ghc,vikraman/ghc,da-x/ghc,siddhanathan/ghc,nkaretnikov/ghc,fmthoma/ghc,fmthoma/ghc,wxwxwwxxx/ghc,green-haskell/ghc,frantisekfarka/ghc-dsi,mcschroeder/ghc,forked-upstream-packages-for-ghcjs/ghc,gridaphobe/ghc,vTurbine/ghc,elieux/ghc,ghc-android/ghc,mfine/ghc,snoyberg/ghc,green-haskell/ghc,GaloisInc/halvm-ghc,bitemyapp/ghc,spacekitteh/smcghc,nathyong/microghc-ghc,sgillespie/ghc,frantisekfarka/ghc-dsi,acowley/ghc,christiaanb/ghc,tibbe/ghc,acowley/ghc,holzensp/ghc,tibbe/ghc,TomMD/ghc,frantisekfarka/ghc-dsi,frantisekfarka/ghc-dsi,forked-upstream-packages-for-ghcjs/ghc,bitemyapp/ghc,TomMD/ghc,nkaretnikov/ghc,GaloisInc/halvm-ghc,nathyong/microghc-ghc,da-x/ghc,sdiehl/ghc,ezyang/ghc,siddhanathan/ghc,wxwxwwxxx/ghc,ml9951/ghc,gcampax/ghc,sdiehl/ghc,mfine/ghc,mfine/ghc,GaloisInc/halvm-ghc,vTurbine/ghc,lukexi/ghc,anton-dessiatov/ghc,shlevy/ghc,spacekitteh/smcghc,jstolarek/ghc,green-haskell/ghc,jstolarek/ghc,olsner/ghc,nkaretnikov/ghc,siddhanathan/ghc,sgillespie/ghc,nushio3/ghc,sgillespie/ghc,olsner/ghc,AlexanderPankiv/ghc,ezyang/ghc,forked-upstream-packages-for-ghcjs/ghc,forked-upstream-packages-for-ghcjs/ghc,lukexi/ghc,TomMD/ghc,anton-dessiatov/ghc,sgillespie/ghc,olsner/ghc,ezyang/ghc,holzensp/ghc,green-haskell/ghc,urbanslug/ghc