Lfun:	set_msgin - set the walking in-message of a monster

Synopsis:
	void set_msgin(string msgin)

Description:
	The set_msgin call sets the walking in-message of a monster.

Return value:
	none

Examples:
	set_msgin("stumbles in");

Note:
	The name of the monster (plus " ") is prepended and ".\n" is
	appended by move_player.
	No punctuation like "." or "!" has to be added at the end, also
	no "\n" at the end.

See also: monster/set_mmsgin, monster/set_msgout, monster/set_mmsgout, living/query_msgin, living/query_msgout, living/query_mmsgin, living/query_mmsgout