port/ipdat.h		1991/0424		Created.
		1991/0705		Add Nreseq.
		1991/1012		Format edits. Add Ilhdr, IL constants, IL queue. Remove Ipconv.tcpctl.
		1991/1013		Add Ilreset state.
		1991/1014		Add IP header fields to Ilhdr. Add Ilcb.window. Add IL connection states. Rename open_tcp to tcpstart.
		1991/1015		Add ilstart, ilstate.
		1991/1019		Bug fix: correct IL_HDRSIZE. Add Lock to Ilcb. Add Ipoutput queue.
		1991/1023		Add ipincoming. In Ipconv: remove ptype, listen, contype. Add newcon.
		1991/1024		Add blank lines. Add Ipconv.ptype.
		1991/1025		Remove Ilcb.outofordertail. Add iloutoforder.
		1991/1026		Add Ilcb.start.
		1991/1027		Rename arp_* to arp*. Add pusharpq, arpsendpkt.
		1991/1028		Remove typedef Arpcache, arp constants. (See XXX).
		1991/1029		Remove arp functions. Add arpinfo queue.
		1991/1101		Rename Ilreset to Ilclose.
		1991/1102		Add Ilcb.timeout.
		1991/1104		Comment edit. Remove I[conv.ptype.
		1991/1106		Add Ilcb.rstart.
		1991/1107		Rename Ilcb.sent to Ilcb.next.
		1991/1114		Add Ipifc.net. Change ipclonecon, iplisten, add ip*fill.
		1991/1115		Add Ipconv.index. Change ipincoming.
		1991/1121		Remove copyb.
		1991/1124		Fiddle with Ilcb. Increase IP_MAX to 32kB.
		1991/1126		In Tcpctl, remove out-of-band data. In Ipconv, add net. Remove appendb. Add ipforme.
		1991/1204		Halve DEF_MSS to 512.
		1991/1205		Put DEF_MSS back to 1024. Remove out-of-band defines.
		1991/1216		Add Fragq.age.
		1991/12171		Lowercase TCP state names.
		1992/0103		Add Lock Ilcb.nxl.
		1992/0105		Remove Ilcb.oblks.
		1992/0107		Change ipfragfree.
		1992/0111		Move error.h to ../port. Change errors to actual strings.
		1992/0128		Move QLock out of Tcpctl XXX why? Change nextport.
		1992/0130		Bug fix?: change BLKFRAG.
		1992/0213		Add extra addresses for Myip. Bug: note that enum is too big!
		1992/0214		Add ipsetaddrs. Bug fix: increase size of Myip.
		1992/0301		In Ilcb: add querytime, deathtime.
		1992/0303		Add Ilcb.syncer, Tcpctl.syner (sic).
		1992/0304		Add Mynetmask.
		1992/0307		In Ipifc: add chkerrs, tx, rx counters.
		1992/0310		Remove dur_timer, read_timer macros. In Ipifc: remove tx, rx counters, add Lock. Add blank line.
		1992/0313		Add ipconbusy. Format edit.
		1992/0320		Halve MSPTICK to 100.
		1992/0321		Bug fix?: change rcvcount, sndcount to ulong.
		1992/0325		Comment edit. Rename copyupb to pullb? Remove iss.
		1992/0414		Change type of Ipconv.newcon.
		1992/0416		Change rcvq to Blist. Move Tctl to end of Tcpctl. Add tcpflushincoming.
		1992/0606		Double Nreseq to 128.
		1992/0614		Change IP_ILPROTO to official allocate number — 40.
		1992/0623		Add Ipconv.Netprot; remove Ipconv.index.
		1992/0625		Format edits.
		1992/0626		Change to keeping list of Ipifc.
		1992/0627		Add Ipconv.headers, for UDP.
		1992/0711		Change initipifc, ip_conn.
		1992/0826		Rename close_self to localclose.
		1992/0903		Rename TCP functions to add tcp prefix, remove underscores.
		1992/0906		Comment edit. Format edit. Add Timer* to replace TIMER_*. Remove Ipifc.Lock.
		1992/12051		Add UNPRIVPORALLOC.
		1992/1221		In Tctl: add sndr, sndrlock, sndfull.
		1993/0218		In Tctl: change int to ulong for seq numbers. Bug fix?
		1993/0220		Change sequence numbers from int] to ulong. Bug fix?
		1993/0501		Change sequence numbers back to int, restore TCPACK, MSPTICK.
		1993/0804		Deleted.