features added (or removed):
 - NT:  added version() checks for MSC 8.5 and 9.0 [Steve S]
 - added COPYRIGHT_CLEAN ifdef for clean, unencumbered code [CN]
 - Unix:  added NeXT-specific info to version() [CN, Mark]
 - noted PKUNZIP limitation with Info-ZIP self-extracting archives [CN,
    Jean-loup]
 - removed superfluous force_flag [CN]
 - converted some "unzip" and "zipinfo" strings to far data [CN]
 - cleaned up version.h at expense of everything else :-) [CN]
 - Unix:  added extra-field support for GMT modification/access times and
    UID/GID [CN]
 - updated Where file with CIX info [Mike Bernardi] and VMS exes names [CN]
 - split out unzip.c and file_io.c routines into new process.c file and updated
    all makefiles accordingly [CN]
 - MS-DOS:  switched to "smarter" verison of gcc_dos target [CN]
 - rewrote unshrink() again to use new, smaller data structures:  now usable
    by small-memory systems (faster than large version, too) [CN]
 - made COPYRIGHT_CLEAN default (no unreduce); added USE_SMITH_CODE for full
    version [CN]
 - OS/2, MS-DOS:  incorporated Watcom/Metaware patches [Kai Uwe]
 - added version macros to crypt.h [CN]
 - VMS:  removed /NOWARNINGS from descrip.mms [CN, Hunter, Christian, etc.]

bugs fixed:
 - MS-DOS:  added "strip funzip" to gcc_dos target [Kevin F]
 - fixed LSEEK usage in do_string() for case when extra bytes prepended [CN]
 - VMS:  fixed ZipInfo wildcard example; noted difference between internal and
    external wildcards in vms/README [CN]
 - ".zip" no longer appended to wildcard specifications except under Unix (no
    other OS allows wildcard characters in filenames [CN, Clay Zahrobsky]
 - MS-DOS:  fixed SET typo in INSTALL [Steve S]
 - VMS:  removed /ANSI from descrip.mms for DEC C on VAX [Hunter]
 - VMS:  fixed include of sys/param.h in crypt.c [Igor]
 - Unix:  removed a comment-separator line from each man page to work around
    bug in broken catman/makewhatis programs [Paul Gilmartin]
 - NT:  added CPU=i386 to makefile [James B]
 - fixed missing-central-dir error message for zipinfo [CN]
 - fixed Watcom/Metaware-patch near/far bug; added __16BIT__ macro [CN]
 - Unix:  added NO_LIMITS_H and NO_DIR for SCO Xenix 2.3.2; also typecasts to
    free() calls to avoid warnings [CN, Mike F]
 - Unix, NT(?):  dropped utime.h and made ztimbuf typedef instead (similar to
    zip) [Jean-loup, CN]
