From the NannyMUD documentation

LAST CHANGE

2000-12-07

COMMAND

NAME
        setflagp - 


SYNTAX
	setflagp  

DESCRIPTION
	This is used to set/change the flag of a property. Valid flags
	are:
	'*' Supported by the Mudlib.
	'+' Will be supported by the Mudlib.
	'-' Will NOT be supported by the Mudlib.
	'D' Deletes presently set flag.
	NOTE! Only the mud administrators (level35++) have the
	authority to change flags on properties. 


EXAMPLE
	setflagp your_property *