4.4BSD snapshot (revision 8.1); add 1993 to copyright

new stdio

added LIBC_SCCS condition for sccs ids

Add copyright

autoconfigure FILE array using getdtablesize()
changed all struct _iobuf to FILE
many miscellaneous changes

utilize st_blksize field to optimize size of reads and writes

date and time created 80/12/21 16:50:56 by wnj