[project @ 2001-03-14 23:19:42 by simonpj]

[project @ 2001-03-14 23:19:42 by simonpj]
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	Fix the dreaded export list bug
	-------------------------------

With unfailing regularity I manage to get the following wrong:

	module A(f) where
	  f = ...

	module B(f) where
	  import A(f)

We must ensure that if A.f changes its type (etc) then B.hi
gets changed, so that people who import B will get recompiled.

There's a large comment with RnIfaces.mkImportInfo, and some
reorganisation in Rename, with a few mainly cosmetic consequences
in RnEnv.

[Simon: I think this will fix the 'OccurAnal not recompiled' problem.]