Notes for a more consistent style....


  *  Okay uses for plain :- commands outside of main.pl:

       :- ensure_loaded(   )
       :- use_module(   )

       :- dynamic
       :- multifile
       :- discontinuous
       :- index
       :- volatile    (although maybe this doesnt work?)
       :- thread_local

       :- initialization mutex_create_if_absent(   ).  

     Why?  Anything else is likely to interact with the startup
           sequence in main.pl, which needs to be careful to handle
           command-line reconfiguration, being compiled, not knowing
           lots of config information until after server startup (when
           we get a port), etc.

  *  Don't fork

     Why?  It seems to interact badly with threads.


  *  Don't define modules

     Why?  Because I'm not sure I understand them well enough,
           and it seems like extra work, and I haven't seen the
           benefit


  *  Every file should start with