id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
503	psMetadataRemove and PS_LIST_UNKNOWN	Paul Price	Paul Price	"PS_LIST_UNKNOWN is supposed to be required for psMetadataRemove --- to remove by
key instead of by position.  The current implementation simply looks at whether
the key is defined.  Should we define separate functions,
psMetadataRemoveByIndex/psMetadataRemoveByKey?

From psList.h:

/** Special values of index into list
 *
 *  This list of possible list position values should be contiguous non-positive
values ending with
 *  PS_LIST_UNKNOWN.  Any value less-than-or-equal-to PS_LIST_UNKNOWN is
considered a undefined position.
 *
 */
enum {
    PS_LIST_HEAD = 0,                  ///< at head
    PS_LIST_TAIL = -1,                 ///< at tail
};"	defect	closed	low		types	unspecified	trivial	fixed		rhl@…