PMutex has been changed to a pseudonym for
PCriticalSection, which means that PMutex::WillBlock()
and PMutex::Wait(time) are no longer available as there
is no equivalent in PCriticalSection.
The old function of PMutex has been altered to
This change was made to better handle mutexes.
There are several places in the GnuGK code where
PMutex::WillBlock() and PMutex::Wait(time) are used,
these are renamed to PTimedMutex to compile nicely.
Most of the rest of the PMutex's are unaffected..
Suggest creating a pseudonym for PTimedMutex of PMutex
if the pwlib version is less than v1.9.2 to ensure