Doc fix: 'cabal freeze PACKAGES' is not supported.
Doc fix: 'cabal freeze PACKAGES' is not supported.

Fixes #2565.
triplepointfive/cabal,trskop/cabal,rimmington/cabal,mydaum/cabal,triplepointfive/cabal,plow-technologies/cabal,kosmikus/cabal,randen/cabal,mmakowski/cabal,plow-technologies/cabal,anton-dessiatov/cabal,thoughtpolice/cabal,garetxe/cabal,sopvop/cabal,eric-stanley/cabal,corngood/cabal,edsko/cabal,Heather/cabal,valderman/cabal,fugyk/cabal,sopvop/cabal,enolan/cabal,gridaphobe/cabal,mydaum/cabal,beni55/cabal,fugyk/cabal,mightybyte/cabal,Heather/cabal,gbaz/cabal,bennofs/cabal,sopvop/cabal,ian-ross/cabal,kosmikus/cabal,edsko/cabal,martinvlk/cabal,thoughtpolice/cabal,ghc-android/cabal,eric-stanley/cabal,gbaz/cabal,mightybyte/cabal,x-y-z/cabal,gridaphobe/cabal,themoritz/cabal,kolmodin/cabal,Peaker/cabal,thomie/cabal,martinvlk/cabal,lukexi/cabal,x-y-z/cabal,Peaker/cabal,Helkafen/cabal,lukexi/cabal,rimmington/cabal,randen/cabal,trskop/cabal,themoritz/cabal,garetxe/cabal,enolan/cabal,kolmodin/cabal,beni55/cabal,headprogrammingczar/cabal,themoritz/cabal,ian-ross/cabal,corngood/cabal,headprogrammingczar/cabal,ghc-android/cabal,valderman/cabal,bennofs/cabal,mmakowski/cabal,Helkafen/cabal,anton-dessiatov/cabal,thomie/cabal