General notes on startup items:

	- In general, it is preferable to use startupitem.executable rather than
	  any of startupitem.init, startupitem.start, startupitem.stop,
	  startupitem.restart. If startupitem.executable is used, a pidfile
	  path and style should also be specified.

startupitem.create
	Choose whether or not to generate a startup item
	
	Type: optional
	Values: yes no
	Default: no
	Example:
		startupitem.create yes
		
startupitem.type
	Select the type of startupitem to generate. By default, a startupitem
	will be generated that is of the appropriate type for the OS. For instance,
	launchd is favored on system 10.4, while SystemStarter is favored on prior
	Mac OS X systems. A global default may be specified with the startupitem_type
	preference in ports.conf.
	
	Type: optional
	Values: SystemStarter, launchd, default, rcNG
	Default: default
	Example:
		startupitem.type launchd

startupitem.executable
	The name of the daemon to be run in the background. This option may contain
	multiple arguments, but they must be appropriate for a call to exec; they
	may not contain arbitrary shell code. This option may not be used together
	with any of the four options startupitem.init, startupitem.start,
	startupitem.stop and startupitem.restart.
	
	Type: optional
	Values: name of executable, and any arguments
	Example:
		startupitem.executable $prefix/bin/wonka
		
startupitem.init
	Shell code that will be executed prior to any of the options startupitem.init,
	startupitem.start, startupitem.stop and startupitem.restart.
	
	Type: optional
	Values: sh code
	Example:
		startupitem.init FOO=start
		
startupitem.start
	Shell code that should be executed to start the daemon.
	
	Type: optional
	Values: sh code
	Example:
		startupitem.start $prefix/share/mysql/mysql.server start
		
startupitem.stop
	Shell code that should be executed to stop the daemon.
	
	Type: optional
	Values: sh code
	Example:
		startupitem.start $prefix/share/mysql/mysql.server stop
		
startupitem.restart
	Shell code that should be executed to restart the daemon. In the absense
	of this key, the daemon will be restarted by taking the stop action,
	followed by taking the start action.
	
	Type: optional
	Values: sh code
	Example:
		startupitem.start $prefix/share/mysql/mysql.server restart
		
startupitem.pidfile
	Specification for pidfile handling. This is particularly useful
	in conjunction with the startupitem.executable key, as in this case
	it is important that the startupitem know how to track the executable.
	This specifies whether the daemon generates its own pidfile (auto), whether
	it generates its own but forgets to delete it, so that the startupitem
	should delete it (clean), or whether it never generates one, in which
	case the startupitem should manage the pidfile on its own (manual), or
	whether no pidfile should be used at all (none).
	
	Type: optional
	Values: none|auto|manual|clean [/path/to/pidfile]
	Default: pidstyle defaults to "none", pidfilepath defaults to
			"${prefix}/var/run/${name}.pid"
	
	Example:
		startupitem.pidfile auto $prefix/var/run/${name}.pidfile
		
startupitem.logfile
	Path to a logfile into which to log events about the lifetime of the
	startupitem. Depending on the type of startupitem, and the manner
	in which it is started, standard output from the daemon may also be
	directed to the logfile.
	
	Type: optional
	Values: path
	Default: /dev/null
	Example:
		startupitem.logfile $prefix/var/log/mydaemon.log
		
startupitem.logevents
	Control whether or not to log events to the log file. If logevents
	is set, events are logged, with their time, to the logfile.
	
	Type: optional
	Values: yes|no
	Default: no
	Example:
		startupitem.logevents yes
		

		
svn.url
	Specify the url from which to fetch files.
	
	Type: required (if subversion is going to be used)
	Values: a legal subversion url
	Default: none
	Examples:
		svn.url http://www.domain.com/svn-repo/mydirectory
		svn.url svn://www.domain.com/svn-repo/mydirectory
		
svn.tag
	Specify the a tag from which svn should fetch files.
	This corresponds to the -r option to the svn cli.
	
	Type: optional
	Values: a legal subversion tag
	Default: none
	Examples:
		svn.tag 1020
		svn.tag {2005-10-05}
		svn.tag HEAD