When setting implied flags, do so recursively.  So if -Xa implies -Xb,
and -Xb implies -Xc, we do the right thing. 

I thought we needed this, but we don't.  But it seems like a good idea
anyway.

This one was missed when the error-ids all moved to Control.Exception.Base
(The nofib test 'fluid' showed it up.)

See Note [Floating in past a lambda group]. The new thing
here is that we previously were not floating in past a group
that had (\(a:*) \(x:State# a). e), with a type var *and* a
one-shot lambda.  

The fix makes wave4main allocate 2% less, and doesn't change any other
nofib number, so it's not a big deal.

See Note [Inlining in ArgCtxt].  This very small change gives quite a
big performance win. Just showing the bigger ones:

        Program           Size    Allocs   Runtime
--------------------------------------------------------------------------------
           anna          -0.7%     -4.3%      0.15
       cichelli          -0.6%     -6.4%      0.15
         fulsom          -0.4%    -18.5%     -8.1%
            gcd          -0.6%    -12.0%      0.06
        integer          -0.6%    -16.2%     -8.4%
          power          -0.7%    -19.3%     -4.8%
--------------------------------------------------------------------------------
            Min          -0.7%    -19.3%    -15.7%
            Max          -0.1%     +0.1%     +5.7%
 Geometric Mean          -0.6%     -1.9%     -4.3%

The original change was to improve a case that Roman found (see test
eyeball/inline1) but that seems to work ok now anyway.

Fixes crash when using compacting GC in parallel programs

Check that all threads marked as dirty are really on the mutable list.

wakeupThreadOnCapbility() is used to signal another capability that
there is a thread waiting to be added to its run queue.  It adds the
thread to the (locked) wakeup queue on the remote capability.  In
order to do this, it has to modify the TSO's link field, which has a
write barrier.  The write barrier might put the TSO on the mutable
list, and the bug was that it was using the mutable list of the
*target* capability, which we do not have exclusive access to.  We
should be using the current Capabilty's mutable list in this case.

This patch removes old code from the Schedule.c file.

I removed GRAN code for GranSim, a simulator for parallel Haskell execution with GpH model.
This code is inactive since ghc-4.x. 

Code for PARALLEL_HASKELL has been partially removed. The remaining code is valid, but can 
refer to nonexisting functionality in other files.

Two threads were trying to move the same TSO.  I like this test, it
has caught plenty of bugs in the past.

The macros were duplicating their arguments, which was normally
harmless, but in the parallel GC was actually wrong and caused
spurious assertion failures.

Hopefully this will fix the SunOS builbot slave.

Also, look for libXXX.dll in addition to XXX.dll (see #1883, this
isn't really a proper fix, but it'll help in some cases).
And I tidied up the error message for a DLL load failure, though it's
still a bit of a mess because addDLL is supposed to return a (static)
string with the error message, but this isn't possible on Windows.

- This adds the new equational solver based on the notion of normalised
  equalities.  
- The new algorithm is conceptually much simpler and will eventually enable us
  to implement a fully integrated solver that solves equality and dictionary 
  constraints together.
- More details are at 
  <http://hackage.haskell.org/trac/ghc/wiki/TypeFunctionsSolving>
- The code is there, but it is not being used yet.

"LATEX_DOCS = YES" enables them

It used to point to a file on haskell.org, which didn't necessarily
describe the right version of core.

Now that we build haddock in the GHC build, we don't need to look for it
on the path.