pc/devfloppy.c		1991/0727		Created.
		1991/0728
		1991/0729
		1991/0730
		1991/0731
		1991/0802
		1991/0803
		1991/0806
		1991/0809
		1991/0810
		1991/0811
		1991/0823
		1991/0831
		1991/0902
		1991/0906
		1991/0913
		1991/0919
		1991/0920
		1991/0921
		1991/0924
		1991/0925
		1991/0927
		1991/1001
		1991/1003
		1991/1005
		1991/1006
		1991/1029
		1991/1112
		1991/1203
		1992/0111
		1992/0114
		1992/0321
		1992/0625
		1992/0711
		1992/0829
		1992/0901
		1992/1002
		1992/1003
		1992/1006
		1992/1007
		1992/1009
		1992/1013
		1992/1016
		1992/1113
		1992/1120
		1992/1216
		1992/1217
		1992/1218
		1993/0219
		1993/0410
		1993/0430
		1993/0915
		1993/1124
		1994/1017
		1995/0105
		1995/0108
		1995/0117
		1995/0218
		1995/0726
		1995/0728
		1995/0818
		1995/1121
		1996/0223
		1996/0315
		1997/0327
		1997/0404
		1997/0408
		1997/0910
		1998/0120
		1998/0213
		1998/0319		Change dev read and write to use vlong offset. Formatting edits.
		1998/0825		Bug fix: print format.
		1999/0403
		1999/0507
		1999/0714		Don't use floppy if ioalloc failed.
		2000/0308
		2000/0813
		2001/0527
		2001/0716
		2001/1117
		2001/1120
		2002/0109		Add devshutdown.
		2003/0325
		2003/0407