Misc cleanup:
- KNF, ANSIfy, remove __P()
- use __func__ to print function names
- use __arraycount()
- include "ioconf.h" for struct cfdriver
- u_intNN_t -> uintNN_t
- wrap long lines
etc.

Replace the startup C code with assembler, which avoids having to
explicitly tell the compiler what registers the Bug args come in on.

cleanup Makefiles, put common stuff to Makefile.booters, ditch unnecessary
stuff
make this all compile with -Wall -Wno-main -Wmissing-prototypes
-Wstrict-prototypes -Werror , also compilable on 1.4

cleanup Makefiles, put common stuff to Makefile.booters, ditch unnecessary
stuff
make this all compile with -Wall -Wno-main -Wmissing-prototypes
-Wstrict-prototypes -Werror , also compilable on 1.4.1
label itself as NetBSD/mvme68k instead of "BSD" in bootblock message
move bugcrt.c to libbug, remove bugcrt directory (bugcrt is still built
and used separately to rest of libbug)
convert sboot to use ordinary mvme68 libsa, instead of copying needed
stuff in libc_sa.c
convert to use version info generated by sys/conf/newvers_stand.sh
instead of previous version.c files, add necessary 'version' files
put chiptotime() to separate libsa file (used also by sboot/clock.c)

Thanks to Steve Woodford for help with this. Note that -current build
might be hosed by this change, will be addressed by Steve shortly.

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update for libbug.h, console I/O