Burry devid port method, which was a gross hack.

Instead make ports provide wanted port and target IDs, and LUNs provide
wanted LUN IDs.  After that core Device ID VPD code only had to link all
of them together and add relative port and port group numbers.

LUN ID for iSCSI LUNs no longer created by CTL, but by ctld, and passed
to CTL as "scsiname" LUN option.  This makes LUNs to report the same set
of IDs, independently from the port through which it is accessed, as
required by SCSI specifications.
Allow the PVID setting on CPU port.

Return our static list of supported media for the CPU port.

Tested on TP-Link 1043ND.
Fix equation and limerick to be correct.  NetBSD fixed this 14 years ago
(src/games/fortune/datfiles/fortunes2 1.7).

PR:		188714
Submitted by:	ksmakoto dd.iij4u.or.jp
Reviewed by:	Wolfram Alpha
MFC after:	3 days