Things were getting rather cluttered with everything being qwaq-* and
all in one directory. Now most have lost the qwaq- prefix and have been
moved into subdirectories (non-recursive make).
I decided I want events for VM enter/exit but enter needs to somehow
pass the function which will be executed (even if a builtin). A generic
void * param seemed the best idea, which meant the error string could be
passed via the param instead of a "global" string in the progs struct.
