Create the "am" index for asynchronous messages. Add @amindex and
@aarg markup for all asynchronous messages, and remove the trailing semicolon in the argument list. Merge all indices into one. (add-member): Malformed sentence fixed. (async-i-am-off, async-i-am-on-obsolete): Mark as obsolete, and tell why they are no longer used. (async-broadcast): Mark as obsolete. (Type Index, Request Index): Removed. (Index): Added.