Info directory file update service

1.  Summary

	This fast-track introduces the Info directory file update
	service, an SMF service which maintains directory files for
	Info documents.

	Patch release binding is requested.

2.  Discussion

	GNU Manual files in the Info format are typically
	accompanied by a directory file which provides the user
	with a menu of the topics for which manuals are available.

	In the SFW consolidation, Info documents are located in
	/usr/sfw/share/info and /usr/share/info and each location
	includes its own directory file, called "dir", covering
	all the Info docs at that location.  Currently, the
	directory files are generated at build-time using the
	"install-info" utility provided by texinfo(4).  All the
	Info documents and the accompanying directory files for
	the consolidation are then delivered together (in SUNWsfinf).

	The problem is that we now wish to deliver the Info docs
	separately, as part of the relevant package.  Also,
	other consolidations, such as JDS, may wish to install
	additional Info docs in the same locations and will
	therefore need to update the directory files.

	Install and remove Class Action Scripts that replicate
	the work of install-info would prove excessively complex
	and so a transient SMF service that rebuilds the directory
	file when any Info docs are installed, removed or modified
	is now proposed.

	This service will use the existing "Software Installation"
	RBAC rights profile.

3.  Interfaces

	Exported Interfaces
	===================
	svc:/application/update/infodir:default		Committed	FRMI
	application/info_dir_path			Committed	Property