Ann: SWI-Prolog 6.6.3

Hi,

Unlike previously promised, I've released SWI-Prolog 6.6.3 because of
two issues:

   - Fixed compile with libreadline 6.3 (non-windows versions).
     Found by Maks Verver.
   - Fixed another Atom-GC crash, notably triggering on slow hardware.
     Isolated by Eugeniy Meshcheryakov (Debian maintainer),
     fixed by Keri Harris.

Also cherry-picked some other obvious fixes and additions from the
development branch.  See below.

	Enjoy --- Jan


========================================
SWI-Prolog Changelog since version 6.6.2
========================================

  * PORT: Check for <readline/history.h> if RLPREFIX is given (MacOS).

  * FIXED: Windows console: have Exit at the end of the menu again

  * UPDATED: Windows builds to use libarchive 3.1.2 (was 3.0.4).

  * FIXED: Item#673: Interrupt and abort during output set user_output
    in error-mode. Ulrich Neumerkel.

  * ENHANCED: limit scope of lock. My mistake in handling Keri's patch
    05d1e50d24ce3b14797178d98d732b159d9b1e2c.

  * FIXED: Bug#142: possible crash when marking records in thread message
    queues

  * FIXED: absolute_file_name/3: use first extension if the same extension
    appears multiple times in the list.

  * PORT: Bug#162: remove prototype for rl_event_hook().  Maks Verver.

  * FIXED: If use_foreign_library/1 loads a C++ object that registers
    at least one predicate, do not complain that it does not have an
    initialization function.


===============
Package archive
===============

  * FIXED: Handling of non-repositioning input.  If seek() fails we should
    reset the error state of the stream.

  * ENHANCED: Fail with a type error if an archive-argument does not
    contain an archive.

  * FIXED: AGC interaction

  * ADDED: archive_property/2.

  * MODIFIED: archive_open/3 renamed compression(Compression)
    to filter(Filter). Old option is still supported for backward
    compatibility.

  * ADDED: Support 3.1.2 archive formats

  * ADDED: All 3.1.2 filters

  * FIXED: archive_open/3: compensated for fixed double close/1.

============
Package clib
============

  * FIXED: uri_file_name/2 in mode (+,-): actually check the file scheme.

  * DOC: replace @tbd for syslog with @see library(syslog)

==============
Package semweb
==============

  * FIXED: Prefer exact file name if present.  Wouter Beek.

  * FIXED: library(semweb/rdf_ntriples): if the input is a binary stream,
    switch it to UTF-8.

  * FIXED: Persistency handling of rdf_reset_db/0.  Was lost on 3.0
    conversion.

  * ADDED: rdf_save_turtle/2 and friends: option prefixes(List) to specify
    the prefixes used in the output.

  * MODIFIED: Update Accept header for library(http/rdf_http_plugin).


============
Package sgml
============

  * ADDED: Dialect support for xhtml and xhtml5.

============
Package xpce
============

  * BUILD: Use <config.h> for building xpce-copy

============
Package zlib
============

  * FIXED: Stream deflate handling of end-of-stream (depends on flushing
    behaviour)

  * ENHANCED: forwarding of deflate errors to exceptions produced by
    reading predicates. Updated the docs to explain that successful
    opening of an input stream using zopen/3 does not imply it is a
    compressed stream.