port/chan.c		1990/0227		Created.
		1990/0303
		1990/0321
		1990/0513
		1990/0515
		1990/0603
		1990/0617
		1990/0707
		1990/08141
		1990/0820
		1990/0821
		1990/0907
		1990/0914
		1990/09141
		1990/1009
		1990/1104
		1990/11211
		1990/1122
		1991/0413
		1991/0414
		1991/0416
		1991/0421
		1991/0423
		1991/0426
		1991/0427
		1991/0705
		1991/0722
		1991/0723
		1991/0727
		1991/0912
		1991/1011
		1991/1105
		1991/1107
		1991/1126
		1991/1206
		1992/0101
		1992/0111		Move error.h to ../port. Change errors to actual strings.
		1992/0213
		1992/0320
		1992/0321		Move lib.h to ../port.
		1992/0520
		1992/0619
		1992/0620
		1992/0711
		1992/0811
		1992/0825
		1992/0919
		1992/1217
		1993/0123
		1993/0330
		1993/0501
		1993/0511
		1993/0526
		1993/1007
		1993/1013
		1993/1015
		1993/1017
		1993/1018
		1993/1111
		1993/1114
		1993/1115
		1993/1121
		1993/1216
		1993/1217
		1994/0115
		1994/0509
		1994/0812
		1994/0813
		1994/1212
		1995/0208
		1996/0730
		1997/0327
		1997/0408
		1997/0813
		1997/1121
		1997/1208
		1997/1210
		1997/1211
		1998/0221
		1998/0224
		1998/0416		Add debugging check for negative channel decrefs.
		1998/0512		Whitespace edit.
		1998/0813
		1998/0829
		1999/0122
		1999/0323		Allow spaces in file names.
		1999/0501
		1999/0629
		1999/0630
		1999/0716
		1999/0718
		1999/0811
		1999/0820
		1999/1105
		1999/1224
		1999/1230
		2000/0322
		2000/0326
		2000/0330
		2000/0904
		2000/1124
		2001/0214
		2001/0424
		2001/0502
		2001/0503
		2001/0504
		2001/0527
		2001/0530
		2001/0601
		2001/0803
		2001/0819
		2001/0822
		2001/0823
		2001/0912
		2001/0919
		2001/0922
		2001/0924
		2001/0926
		2001/1118
		2001/1130
		2001/1204
		2001/1213
		2002/0104
		2002/0109		Add chandevshutdown.
		2002/0115		Remove 9P2000 transition code.
		2002/0411
		2002/0416
		2002/0731
		2002/0801
		2002/0830
		2002/0911
		2003/0303
		2003/0509