add Berkeley specific header

add Berkeley specific header

SCCS-vsn: usr.sbin/lpr/filters/Makefile 5.4
SCCS-vsn: old/vfilters/Makefile 6.3
SCCS-vsn: old/vfilters/vplotf/chrtab.c 5.2
SCCS-vsn: old/vfilters/necf/necf.c 5.2
SCCS-vsn: old/vfilters/railmag/railmag.c 5.2
SCCS-vsn: old/vfilters/rvcat/rvcat.c 5.3
SCCS-vsn: old/vfilters/rvsort/rvsort.c 5.2
SCCS-vsn: old/vfilters/sidebyside/sidebyside.c 1.3
SCCS-vsn: old/vfilters/vcat/vcat.c 5.3
SCCS-vsn: old/vfilters/vdmp/vdmp.c 5.2
SCCS-vsn: old/vfilters/vpf/vpf.c 5.2
SCCS-vsn: old/vfilters/vplotf/vplotf.c 5.3
SCCS-vsn: old/vfilters/vpltdmp/vpltdmp.c 5.2
SCCS-vsn: old/vfilters/vpsf/vpsf.c 5.2
SCCS-vsn: old/vfilters/vsort/vsort.c 5.1