* config/i386/nbsd.mh, config/m68k/nbsd.mh, config/ns32k/nbsd.mh (XDEPFILES): Add ser-tcp.o.
m68knbsd-nat.c: New files, support for NetBSD/m68k. * configure.in (m68k-*-netbsd*): New config. * configure: Regenerated.