[Hackage] #543: ghc global package db should live in /var not /usr

[Hackage]

#543: ghc global package db should live in /var not /usr
----------------------------+-----------------------------------------------
  Reporter:  nr             |        Owner:         
      Type:  defect         |       Status:  new    
  Priority:  normal         |    Milestone:         
 Component:  Cabal library  |      Version:  1.6.0.1
  Severity:  normal         |     Keywords:         
Difficulty:  unknown        |   Ghcversion:  6.8.2  
  Platform:  Linux          |  
----------------------------+-----------------------------------------------

Comment(by duncan):

 Note of course that following the `./configure` file layout convention and
 having relocatable packages are orthogonal. It is still possible to
 `./configure` and put everything under one prefix (e.g. /opt/ghc-x.y/).

 Then whether ghc defaults to one or the other scheme is up to the
 packager. Generic binary tarballs should probably be relocatable and self
 contained, while Linux distros will continue to use their current scheme.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/543#comment:4>
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