make tar work with quads
XXX: didn't fix scanf(3) to handle %q, which is the real fix for some of htis

Added -Hh flags.

new copyright; att/bsd/shared

ANSI fixes
convert struct direct to struct dirent; convert getwd(3) to getcwd(3)

string.h is ANSI C include file

file system reorg and pathnames.h

use strerror(3), minor lint cleanups

add 's' flag, to strip off leading slashes

make ANSI C compatible

ANSI C; sprintf now returns an int.

another long foul-up

when a directory appears twice on a tape; bug report 4.3BSD/bin/19

handle file args with 't' option; missing arg to fprintf in guy's delta; lint.

restore stick bits on directories; fix up comments on dodirtimes().

more consistant error codes; choose block size more carefully (from guy@sun)

careful about that unlink (from Keith Muller muller@sdcsvax)

force Bflag when using stdin; gracefully handle EOF on input

preserve mtimes of extracted dirs; fix bug in vfile printing;
some cleanup and linting; remove chgreel() at kjd's request

Add copyright

Tape Blocking via stat, vfile output and linebuffering output
F flag now skips RCS files, Force i/o blocking to 20 over non tape devices

remove RCS header from BRL, remove code that page aligns buffers
malloc does page alignments.

Exact copy recived from BRL, This is a more efficient version

use optimal block size (from stat), handle multiple volumes.

check that chdir worked before trying to read directory (genji@topaz)

set directory modes correctly (from shannon)