+options DECBIT #here because clnp.h wanted it here
+ #support for CLNP ``congestion
+ #experienced'' bit in ISO-TP
+options TROLL #CLNP network error simulator
+options ICMPPRINTFS #ICMP packet dump by printf()
+options NSERRPRINTFS #ditto for XNS Error protocol
+ #^^above three NOT RECOMMENTED
+options FASTLINKS #support for fast symbolic links
+options MACHVMCOMPAT #support for Mach-style vm calls
+options IPBROADCASTECHO=1 #send reply to broadcast pings
+options IPMASKAGENT=1 #send reply to icmp mask requests
+options TPCONS #support X.25 network-layer service
+options USER_LDT #allow user-level control of i386 ldt
+
+# See /sys/i386/doc/sound.doc for information about EXCLUDE options for
+# the sound drivers.
+
+# Multicast support.
+options MULTICAST # Multicast code
+options MROUTING # Multicast routing