* gdb.texinfo (main menu): Add Annotations.

	* gdb.texinfo (main menu): Add Annotations.
	(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.