[Hackage] #324: Deprecate package-url field

[Hackage]

#324: Deprecate package-url field
----------------------------+-----------------------------------------------
  Reporter:  duncan         |        Owner:         
      Type:  enhancement    |       Status:  new    
  Priority:  normal         |    Milestone:         
 Component:  Cabal library  |      Version:  1.2.3.0
  Severity:  normal         |     Keywords:         
Difficulty:  normal         |   Ghcversion:  6.8.2  
  Platform:                 |  
----------------------------+-----------------------------------------------
 The package-url field was originally supposed to be to tell users where
 exactly they could find the .tar.gz package for this version of the
 package. That was from a time before hackage and so now it is redundant
 because hackage provides the package url. The field is generally unused
 and when it is used it often just links to the darcs repo or home page.

 We should deprecate it and suggest people use the homepage url and the new
 way of specifying a source control repo (see #58).

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/324>
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