ip/devip.c		1997/0327		Created.
		1997/0403
		1997/0408
		1997/0423
		1997/0508
		1997/0531
		1997/0806
		1997/0811
		1997/0815
		1997/0823
		1997/0916
		1997/1030
		1997/1104
		1997/1105
		1997/1128
		1998/0306
		1998/0310
		1998/0313
		1998/0319		Change dev read and write to use vlong offset.
		1998/0321		Bug fix?: zero cv->incall on close.
		1998/0324		Let Fsrcvpcol defer to f->ipmux.
		1998/0327		Defer to f->ipmux even wehn f->t2m[proto] isn't there. Bug fix? XXX
		1998/0423		Call nullmediumlink and pktmediumlink so they can register with addipmedium.
		1998/0502		Add optional multicast address argument to addmulti control message.
		1998/0509		Add Fsrcvpcolx, which is Fsrcvpcol but ignores f->ipmux.
		1998/0630
		1998/0709
		1998/0710
		1998/0717		Increase Statelen (for stats, probably).
		1998/0825		Bug fix: print format.
		1998/0924
		1998/1127
		1999/0302
		1999/0316
		1999/0320
		1999/0629
		1999/0711
		1999/0817
		1999/0901
		1999/0910
		1999/1230
		2000/0116
		2000/0126
		2000/0220
		2000/0424
		2000/1220
		2000/1221
		2000/1227
		2001/0118
		2001/0126
		2001/0209
		2001/0210
		2001/0227
		2001/0301
		2001/0306
		2001/0403
		2001/0405
		2001/0430
		2001/0527
		2001/0922
		2001/1106
		2001/1120
		2001/1204
		2001/1207
		2002/0109
		2002/0217		Convert to new fmt library.
		2002/0324
		2002/0325
		2002/0507
		2002/0514
		2002/0516
		2002/0601
		2002/0625
		2002/0711
		2002/0712
		2002/1110
		2003/0308
		2003/0423