protocols: Update with IANA list

- Update /etc/protocols with IANA list updated 2026-03-09.
- Document that 240 (pfsync) is not assigned by IANA.
- Document deprecated protocols.

PR:		295739
Reviewed by:	des
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D57445

lib/libc/net/protocols

@@ -16,7 +16,7 @@ igp	9	IGP		# any private interior gateway (Cisco: for IGRP)
 bbn-rcc	10	BBN-RCC-MON	# BBN RCC Monitoring
 nvp	11	NVP-II		# Network Voice Protocol
 pup	12	PUP		# PARC universal packet protocol
-argus	13	ARGUS		# ARGUS
+argus	13	ARGUS		# ARGUS (deprecated)
 emcon	14	EMCON		# EMCON
 xnet	15	XNET		# Cross Net Debugger
 chaos	16	CHAOS		# Chaos
@@ -56,7 +56,7 @@ bna	49	BNA		# BNA
 esp	50	ESP		# encapsulating security payload
 ah	51	AH		# authentication header
 i-nlsp	52	I-NLSP		# Integrated Net Layer Security TUBA
-swipe	53	SWIPE		# IP with Encryption
+swipe	53	SWIPE		# IP with Encryption (deprecated)
 narp	54	NARP		# NBMA Address Resolution Protocol
 mobile	55	MOBILE		# IP Mobility
 tlsp	56	TLSP		# Transport Layer Security Protocol
@@ -99,7 +99,7 @@ larp	91	LARP		# Locus Address Resolution Protocol
 mtp	92	MTP		# Multicast Transport Protocol
 ax.25	93	AX.25		# AX.25 Frames
 ipip	94	IPIP		# Yet Another IP encapsulation
-micp	95	MICP		# Mobile Internetworking Control Pro.
+micp	95	MICP		# Mobile Internetworking Control Pro. (deprecated)
 scc-sp	96	SCC-SP		# Semaphore Communications Sec. Pro.
 etherip	97	ETHERIP		# Ethernet-within-IP Encapsulation
 encap	98	ENCAP		# Yet Another IP encapsulation
@@ -126,7 +126,7 @@ stp	118	STP		# Schedule Transfer Protocol
 srp	119	SRP		# SpectraLink Radio Protocol
 uti	120	UTI		# UTI
 smp	121	SMP		# Simple Message Protocol
-sm	122	SM		# SM
+sm	122	SM		# SM (deprecated)
 ptp	123	PTP		# Performance Transparency Protocol
 isis	124	ISIS		# ISIS over IPv4
 fire	125	FIRE
@@ -147,8 +147,13 @@ hip	139	HIP		# Host Identity Protocol (RFC5201)
 shim6	140	SHIM6		# Shim6 Protocol (RFC5533)
 wesp	141	WESP		# Wrapped Encapsulating Security Payload (RFC5840)
 rohc	142	ROHC		# Robust Header Compression (RFC5858)
-#	138-254			# Unassigned
-pfsync	240	PFSYNC		# PF Synchronization
+ethernet	143	Ethernet	# Ethernet (RFC8986)
+aggfrag	144	AGGFRAG		# AGGFRAG encapsulation payload for ESP (RFC9347)
+nsh	145	NSH		# Network Service Header (RFC9491)
+homa	146	Homa		# Homa
+bit-emu	147	BIT-EMU		# Bit-stream Emulation (RFC9801)
+#	148-252			# Unassigned
+pfsync	240	PFSYNC		# PF Synchronization [non IANA]
 #	253-254			# Use for experimentation and testing (RFC3692)
 #	255			# Reserved
 divert	258	DIVERT		# Divert pseudo-protocol [non IANA]