* gdbserver/low-hppabsd.c (buf2, environ, quit, quit_flag):

* gdbserver/low-hppabsd.c (buf2, environ, quit, quit_flag):
Removed unused variables and declarations.
* gdbserver/low-linux.c (buf2, environ, query, quit, quit_flag):
Likewise.
* gdbserver/low-nbsd.c (buf2, environ, quit, quit_flag):
Likewise.
* gdbserver/low-sparc.c (buf2, environ, query, quit, quit_flag):
Likewise.
* gdbserver/low-sun.c (buf2, environ, query, quit, quit_flag):
Likewise.

* gdbserver/low-hppabsd.c, gdbserver/low-linux.c,
gdbserver/low-nbsd.c, gdbserver/low-sparc.c, gdbserver/low-sun3.c
(create_inferior): Update comment.

* gdbserver/low-nbsd.c (initialize_arch, fetch_inferior_registers,
store_inferior_registers): Provide implementations for the m68k
and ns32k.
* config/m68k/nbsd.mt (GDBSERVER_DEPFILES): Add low-nbsd.o
* config/ns32k/nbsd.mt (GDBSERVER_DEPFILES): Likewise.
* configure.tgt (m68*-*-netbsd*, ns32k-*-netbsd*): Add gdbserver
to configdirs.
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