I'd like to put an updated patch for both gdb.texinfo and texi2pod.pl,
plus the new comparing result.

etc/ChangeLog:

        * texi2pod.pl (postprocess): Move command process for '@sc' to the
        front of '@dfn'.  Add a new command process for '@t{...}', just print
        the content.

gdb/doc/ChangeLog:

        * gdb.texinfo (Man Pages): Remove the content of man OPTIONS
gdb, add
        a cross reference to 'Invoking GDB'.
        (Invoking GDB): Share the option sub-sections with man OPTIONS
gdb,
        move the uniqe part of man here.  To display correrctly in man
page,
        change '@xref' after a comma to 'see @ref', and change '@table
@code'
        to '@table @env'.

Best regards,
Mingjie