* harbour/include/hbclass.ch
+ extended support for xbase++ compatible method declaration:
[SYNC] METHOD <methodName1>[([<params>])] ;
[ , <methodNameN>[([<params>])] ]
* harbour/include/hbthread.h
* harbour/source/vm/thread.c
* harbour/source/vm/classes.c
+ added alternative support for SYNC method which does not use
sync mutexes. The old method is still present. I'll remove it
when xbase++ users confirm that the new one exactly emulates
xbase++ behavior.
* harbour/source/vm/classes.c
* harbour/source/rtl/tthreadx.prg
* switch to alternative SYNC method implementation which seems to be
xbase++ compatible - please test
! fixed missing thread interrupt in recent modification for ::setInterval
8e70525b66