* annotate.texi (Annotations): When GDBN omit @chapter and @node entry.
* gdb.texinfo: Check for @ifinfo instead of @ifnottex.
(rluser.texinfo, inc-hist.texinfo, annotate.texi): Add local @chapter
and @node entries.
* gdb.texinfo: Link all top-level nodes.
* inc-hist.texinfo: When GDBN omit the chapter/node.
* rluser.texinfo (Command Line Editing): Ditto.
(File Options): Add @cindex entries for each command-line option.
Document --epoch, --annotate, --async, --interpreter, --write,
--statistics, and --version.
* annotate.texi: Convert to a chapter. Use @value{GDBN} instead
of GDB.