cast pid to long, not int.

since it's stored that anyway.  also add a debug-for-debug
message, which we'll leave commented out.
ensure freeprocessing inits after debug stuff.
allow undefined symbols.

some systems seem to wait until load time to resolve symbols in
the dynamic loader... so this is can't be portable.  oh well.
parse/understand a new 'ascii' type in the cfg file.
unset LD_PRELOAD during our initialization.

this makes sure spawned children don't get initialized.  something
about the PsiPhi sim was breaking when they tried to use 'system';
since there's not really a use case that makes sense for wanting
to spawn children, just disable that.  We might need to revisit
this at some point.
add start of a program for the NETZ guys' sim.
Add a note about the LD_PRELOAD/forking issue.
ignore libnetz