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This portutil is a sample implementation to request for comments.
Please tell me if you have any problems or requests.

Before using portutil, place pkgdb_sh to a directory listed in your $PATH
and fix all inconsistencies of package database by running "pkgdbsh -Fi" once.
If you have already fixed them by pkgdb(portupgrade) command, you can omit this operation.
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NAME
	portutil -- lightweight ports/packages management tool for base system

SYNOPSIS
	portutil [command] [options] [[localopts] pkgname]]
	pkgdb_sh [-afFhiQ] [-s /OLD-dep/NEW-dep/] [-o pkgname=new/origin]

COMMANDS
	Following commands are available for portutil:
	info		Display information about specified ports.
	build		Build specified ports.
	fetch 		Fetch distfiles or packages for specified ports.
	install		Install specified ports.
	deinstall	Uninstall specified packages.
	backup		Create packages from specified already installed packages.
	update		Update specified packages from ports.
	clean		Cleanup working directory of specified ports.
	distclean	Cleanup distfiles of specified ports.
	package		Make packages from specified ports.
	config		Update configuration of specified ports.
	rmconfig	Remove configuration of specified ports.

OPTIONS
	If you run portutil without arguments, it displays available options.
	Almost all of options are compatible with portupgrade(1).

DIFFERENCE FROM PORTUPGRADE
	-w option is enabled by default.
	-P and -PP options are integrated to -P option.

	-z option is added. This option prevents from creating backup packages at update.

	-i option is added to pkgdb_sh command.

EXAMPLES
	portutil update <pkg>
	portutil fetch -RP <port> && portutil install -RP <port>
	pkgdb_sh -Fi

BUGS
	For compatibility with portupgrade(1), -r and -R work in opposite to essential implementation.
	To suppress this behaviour, add COMPAT_PORTUPGRADE=NO to the "options" file.

	distclean command of portutil has a problem regarding removal of patch files.
	pkg_sort command is not implemented yet.
	-R option of ports_glob command is not implemented yet.