pass at doc for two new remote targets---29K using UDI, and Tandem
ST2000 using STDBUG.
* doc/all.m4, doc/none.m4: new m4 switch, _ST2000__
* doc/all.m4: turn on H8/300 stuff for generic manual
* doc/gdb.texinfo: fix shameful error of agreement reported by
jimb@occs.cs.oberlin.edu (Jim Blandy)
* doc/gdb.texinfo: remove old partial discussion of remote serial
protocol (via serial debug stubs)
* doc/gdbinv-m.m4.in, doc/gdbinv-s.m4.in: new section discussing
use of serial debug stubs
* gdbinv-s.m4.in: refrain from using @cartouche for just a few
examples (not consistent w others).
gdb.texinfo: issue disclaimer paragraph on cmdline options only
for generic vn of doc
* gdb.texinfo, none.m4, h8.m4, gdbinv-s.m4.in: improve H8/300
conditionals; introduce a few generic switches that may be
useful for other cross-dev or dos-hosted configs.
* gdb.texinfo: fix typo in "info reg" description
* gdb.texinfo: slight expansion of new text on reading info files
* gdbinv-s.m4.in: correct and expand info on cross-debugging
H8/300 from DOS.
* ChangeLog: guess...
