Bitfields for REAL/32 queue flags:
Bit(s)	Description	)
 0	mutual exclusion queue
 1	can not be deleted
 2	restricted to system processes
 3	RSP message queue
 4	reserved for internal use
 5	RPL address queue
 7-6	reserved for internal use
 15-8	reserved for future use
SeeAlso: #04042