portable archive interchange changes since the last release

07/17/95 fix -w output to stdout initialization bug
	 fix stdin file list peek bug that dropped trailing files
05/09/95 don't check member count unless its really a trailer
	 sfkeyprintf lookup string arg is now the format conversion character
	 initialize output archive for -rw to stdout archive
	 misc.c had putc() and fgets()!
	 unused var cleanup
	 add return to listprintf()
	 fix delta pass missing dir fd bug
	 fix dirprefix for /
	 add bax.sh as an *example*
04/01/95 with proto va_start() must come before any arg references
	 fix delta bug that failed to mark emitted or skipped members
	 allow -z for patch deltas
	 be sure to set ap->format before binit()
	 fix ordering bug that botched most deltas!
	 use file.name (after -s maps) rather than file.path in delta hash
	 fix bget() bug that skipped checksum
03/19/95 first round with POSIX 1003.2 1995 
	 handle file holes on input
	 delta header contains member index and trailer size
	 delta trailer contains member checksum
	 delta epilogue contains member count
03/01/95 internal redesign using Archive_t handles instead of global state
	 -o ordered (-O) allows single pass through base
02/14/95 make -u work with VPATH
	 -x composes gzip,compress,delta,delta88,ignore,patch with real formats
	 -x gzip:tar, -x gzip,tar, -x 'gzip tar' accepted
	 -x delta is equivalent to -z -
	 -o delta deleted
	 fix OPT_owner null dereference
	 fix archive pass bug that didn't update DELTA_create members
01/19/95 detect compress and gzip on input
	 add -f -z grouping with -r -w to support -r -f -z -w -f -z
	 fix a few compress/delta ineraction bugs
	 add -t s[#]k[#] to skip all [#] and/or keep all [#] tape volumes
	 use new <align.h> ALIGN_ identifiers
01/11/95 add s option to -s to stop on success
	 add delta 94 (vdelta)
	 add long option names
	 deprecate most flag options
	 DELTA_TEMP <64K avoids temp file
	 add -o delta=patch for patch archives
12/25/94 add lib/pax/*.fmt args files for unknown formats
	 fix mknod() calls to use the right file type!
11/11/94 fix ar out of phase warning
08/11/94 add -Rh'header' and -Rt'trailer' for vdb write
	 -e now works for -rw
08/11/93 add vdb `virtual database' r/w format
06/11/93 fix bug that didn't output non-regular files
	 -w now uses FTW_POST to preserve dir modes
04/01/93 handle PORTAR long member name table
04/01/92 copy all 0 length files out regardless of read permission
08/11/91 add check for garbage after end tar implementation bug
10/01/90 add mips ar format out of date check
08/11/90 header/trailer alignment now table driven
07/20/90 fix binary output bug that set header size and time to 1
06/01/90 fix misc delta compression bugs
05/01/90 fix DELTA_create bug that did not check COMPRESS
03/28/90 bump regular output block size to 8k
02/11/90 delta changes held off by #if new_delta_format until new libdelta
	 base archive checksums incompatible with previous versions
02/06/90 fix newio() bug that looped when write() returned 0
01/25/90 add proposed posix 1003.1b archive/interchange format
	 tune buffering
	 change -R option for general record support
	 generalize delta id file name -- incompatible with old format
	 prepare for new libdelta and subsequent incompatibilities
12/01/89 add self-delta support, delete -A option (one algorithm with versions)
11/18/89 fix dir mode restoration bug
11/11/89 fix delta update with older file
10/31/89 add portarch and randarch readonly object formats
10/11/89 allow -f with -rwz
10/01/89 add -Bmaxblocks and -C to match latest tar/cpio extensions
08/22/89 align read() buffers to IOALIGN
07/27/89 add EFBIG & EDQUOT checks to newio()
07/04/89 fix cpio binary header mtime and size swab bug
	 fix -rw bug that makes it work now!
	 redo file post processing restoration
05/11/89 handle GNU-tar USTAR format botch
	 missing intermediate directories inherit mode of nearest ancestor
	 fix names on stdin bug that only did -P
	 incorporate lar changes from David Muir
	 expand -R arg syntax
	 handle ansi/ibm D,F,S,U,V formats on output
03/28/89 fix bget() buffer boundary error for reads < buffersize
03/01/89 ignore DELTA_PASS file set*() calls
02/22/89 fix bread bug for 0 count and bget memcpy overlap
01/18/89 fix copyout() rfd<0 delta bug that generated multiple entries
01/11/89 fix dirsize!=0 bug; change ftwalk XDEV implementation
12/11/88 fix symlink->nowhere bug
11/22/88 add vmsbackup readonly format; fix lseek validity checks
11/17/88 add -T040 to simulate tape device blocking on input
11/11/88 add s5r4 asc and aschk formats
11/07/88 hard links and deltas don't cross volumes
11/01/88 add -n to read exact file list
10/20/88 add bread(0,...) to skip, bget() and bput() io optimizations
10/11/88 fix delta ops to use pattern args
10/04/88 fix argc bug that botched -rw with file args
10/01/88 for delta update, verify that untouched files match base archive
09/30/88 fix allocate() bug: malloc() -> calloc()
08/23/88 use libx/memsum() for checksum calculations
08/20/88 add `![command]' to end of medium replies
08/18/88 table of contents output to stdout
08/08/88 update for libx/ftwalk() and libx/strls()
07/28/88 streamline ftwalk() interface
07/21/88 finish up -a and -u tar compatibility
07/17/88 add cpio.sh and tar.sh interface scripts
07/15/88 convert to pax