4.4BSD snapshot (revision 8.1); add 1993 to copyright

avoid warning

avoid dragging in rune code to keep it small

new include location

make kernel includes standard

check for corrupt directory entry (d_reclen == 0) in readdir()
so we don't get stuck in an infinite loop. also pass in directory name
for better diagnostics.

attempt to make compile with new hierarchy and recent vm changes;
These changes are as yet untested

delete obsolete printf formats (%D -> %ld)

date and time created 91/05/05 13:20:19 by bostic