* 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...