Don't forget to re-enable fixHyperthreading for releases

[Martin Aumueller]

Hi,

for testing purposes I commented out the call to fixHyperthreading() in 
app.cpp, as I think that this does not work around bugs of hyper-threading 
processors, but that it just masks race conditions and other bugs that show 
up on multi-cpu systems. Because of this, it actually will improve stability. 
Thus, I suggest to re-enable the call to fixHyperthreading() before making a 
release. This can't hurt anything except performance. In case I should forget 
to do so, please keep that in mind.

Martin