Name: set_quest - set a quest in a player

Syntax:
	int set_quest(string guild)

Description:
	The set_quest marks a quest as solved in a player. Valid quests are
	listed in /include/quest-data.h.

	You can only set a quest on a player if you own this quest and only
	from the room specified in quest-data.h.

	Note: If you try to set a player's quest illegally, this will be
	logged!

Return value:
	1 if the set_quest was successful, 0 if not.

Examples:
	this_player()->set_quest("orc_slayer");

See also: player/query_quests