things todo

midibuff.h is called twice from midifns.c
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    in midifns.c, look for the note on BSDisms - when compiling with ANSI C (xlc) for RS6000/AIX,
	BSD is turned off, but our code needs some defines for select().
    same problem in userio.c: see NBBY define

    in conduct.c/main: next_time and last_flag should be initialized
	according to the score, not to zero and false.
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fix Quick C stack setup in interrupt
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Idea for the future -- overlay files in adagio, to merge.  Two, use the
e and f commands to filter what is w'd.
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