Unbundle ext/wddx

The extension is now available from <https://pecl.php.net/package/wddx>.

Cf. <https://wiki.php.net/rfc/deprecate-and-remove-ext-wddx>.

Author: cmb69

EXTENSIONS

@@ -201,11 +201,6 @@ PRIMARY MAINTAINER:  Dmitry Stogov <[email protected]> (2004 - 2018)
 MAINTENANCE:         Maintained
 STATUS:              Working
 -------------------------------------------------------------------------------
-EXTENSION:           wddx
-PRIMARY MAINTAINER:  Andrei Zmievski <[email protected]> (1999 - 2003)
-MAINTENANCE:         Orphaned
-STATUS:              Working
--------------------------------------------------------------------------------
 EXTENSION:           xml
 PRIMARY MAINTAINER:  Thies C. Arntzen <[email protected]> (1999 - 2002)
                      Rob Richards <[email protected]> (2003 - 2013)

NEWS

@@ -113,6 +113,6 @@ PHP                                                                        NEWS
     tidy_get_root, and tidy_getopt) (tandre)
 
 - WDDX:
-  . Deprecated the WDDX extension. (cmb)
+  . Deprecated and unbundled the WDDX extension. (cmb)
 
 <<< NOTE: Insert NEWS from last stable release here prior to actual release! >>>

UPGRADING

@@ -287,7 +287,7 @@ PHP 7.4 UPGRADE NOTES
   . The @param notation can now also be used to denote SQL query parameters.
 
 - WDDX:
-  . The WDDX extension has been deprecated.
+  . The WDDX extension has been deprecated and moved to PECL.
 
 - Zip:
   . The bundled libzip library has been removed. A system libzip >= 0.11 is now