add Berkeley specific copyright notice

add Berkeley specific copyright notice

SCCS-vsn: old/dbx/asm.c 5.3
SCCS-vsn: old/dbx/c.c 5.9
SCCS-vsn: old/dbx/cerror.iris.s 5.2
SCCS-vsn: old/dbx/cerror.sun.s 5.2
SCCS-vsn: old/dbx/cerror.tahoe.s 5.3
SCCS-vsn: old/dbx/cerror.vax.s 5.3
SCCS-vsn: old/dbx/check.c 5.3
SCCS-vsn: old/dbx/commands.y 5.5
SCCS-vsn: old/dbx/coredump.c 5.4
SCCS-vsn: old/dbx/dbx.1 6.3
SCCS-vsn: old/dbx/debug.c 5.2
SCCS-vsn: old/dbx/defs.h 5.3
SCCS-vsn: old/dbx/eval.c 5.6
SCCS-vsn: old/dbx/events.c 5.4
SCCS-vsn: old/dbx/fortran.c 5.5
SCCS-vsn: old/dbx/iris.c 5.2
SCCS-vsn: old/dbx/keywords.c 5.3
SCCS-vsn: old/dbx/languages.c 5.2
SCCS-vsn: old/dbx/library.c 5.3
SCCS-vsn: old/dbx/lists.c 5.2
SCCS-vsn: old/dbx/main.c 5.6
SCCS-vsn: old/dbx/makedefs.c 5.5
SCCS-vsn: old/dbx/mappings.c 5.4
SCCS-vsn: old/dbx/mkdate.c 5.4
SCCS-vsn: old/dbx/modula-2.c 5.3
SCCS-vsn: old/dbx/names.c 5.3
SCCS-vsn: old/dbx/object.c 5.3
SCCS-vsn: old/dbx/operators.c 5.2
SCCS-vsn: old/dbx/ops.iris.c 5.2
SCCS-vsn: old/dbx/ops.tahoe.c 5.6
SCCS-vsn: old/dbx/ops.vax.c 5.6
SCCS-vsn: old/dbx/pascal.c 5.2
SCCS-vsn: old/dbx/printsym.c 5.6
SCCS-vsn: old/dbx/process.c 5.4
SCCS-vsn: old/dbx/runtime.iris.c 5.2
SCCS-vsn: old/dbx/runtime.tahoe.c 5.4
SCCS-vsn: old/dbx/runtime.vax.c 5.4
SCCS-vsn: old/dbx/scanner.c 5.2
SCCS-vsn: old/dbx/source.c 5.3
SCCS-vsn: old/dbx/stabstring.c 5.4
SCCS-vsn: old/dbx/symbols.c 5.6
SCCS-vsn: old/dbx/tahoe.c 5.6
SCCS-vsn: old/dbx/tree.c 5.4
SCCS-vsn: old/dbx/vax.c 5.6