Tweak the "My Bug Database" menu link so it points to a particular project
in the bugdb.

	* www/gotobugdb.php3: Pass on the project_title argument if one is
	given.

	* www/menu.php3: Make the bugdb link context-sensitive or have it
	link to the project the user was first approved for.
	Context-sensitivity is determined by whether or not a "pid"
	argument is given.