[273,55]	Various skeleton filter programs.

BORING.C	Classic. getchar() putchar() ... EOF

F.C		Fgetss(). Fputss().

FALTER.C	Fgetss(). Fputss().

FILTER.C	Fgetss(). Fputss(). Use to sort out kinky files
		with more than one line/record.

FILTERIN.C	Fgetss(). As for filter.c, but does no output.

UFILTER.C	You must name the files. I/O redirection won't work.
		Fast as they use fget() & fput(). Binaries work
		pretty well, but kinky many lines per record files
		will lose.

UFILTER2.C	Fails for binary files. Fast as it uses fget() &
		fput(). I/O redirection works.

UFILTER3.C	Nicer UFILTER2. Modular get & put of records. Still
		useless for binary files. Still redirects.

UFILTER4.C	Modular. Ultimate weapon for speed. OK for binaries.
		No redirection. NO '\n' funnies. Recommended skeleton
		for production stuff.

UFILTER5.C	As UFILTER4, but seperate input & output buffers.
		Recommended skeleton for production stuff.