Changes in 6.8.3:
* The arguments to ghc-pkg now understand lists and wildcards, and
there is a new command ghc-pkg find-module.
* The filename completion in ghci is now more intelligent.
* We now look for GHCi config files in these locations:
./.ghci
$HOME/.ghc/ghci.conf
$HOME/.ghci
* You can now give multiple -e options to GHC.
* You can now use the -prof and -threaded flags together, although
you cannot also use +RTS -N2.
* SCC names are no longer allowed to contain spaces, as some of the
profiling tools break if they do.
* Various changes have been made to GHC's internals, so there are some
differences in the API exposed by the ghc package. Most notably,
checkAndLoadModule has now been implemented.
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