Log Message:
xerces-c: update to 3.2.3.

Release Notes - Xerces-C++ - Version 3.2.3

** Bug
    * [XERCESC-1963] - Custom HTTP headers missing with CURL NetAccessor
    * [XERCESC-2126] - Type Confusion from DTDGrammar to SchemaGrammar
    * [XERCESC-2146] - Patch to build with older GCC
    * [XERCESC-2155] - fix build without pthread
    * [XERCESC-2158] - XMLUTF8Transcoder: One multibyte UTF8 character is \ 
swallowed from the srcData when the resulting surrogate pair does not fit in \ 
toFill at the end
    * [XERCESC-2160] - Postpone freeing the memory being used by CURL
    * [XERCESC-2161] - No rule to make target \ 
'/src/xercesc/util/MsgLoaders/MsgCatalog/XercesMessages_en_US.Msg'
    * [XERCESC-2168] - Memory leak in ValueVectorOf
    * [XERCESC-2172] - There is an error in the parameters of the ThreadTtest8 \ 
script in Apache xerces-c++ XML's tests/script
    * [XERCESC-2176] - Incorrect symbolic links created for Linux static library \ 
and MacOS static and shared libraries
    * [XERCESC-2177] - invalid windows version check for `onXPOrLater`
    * [XERCESC-2180] - Handle surrogate pairs when reading a QName instead of \ 
ASSERTing
    * [XERCESC-2185] - Janitor.hpp fails to compile on Solaris with Solaris \ 
Studio 12.2 and 12.4
    * [XERCESC-2186] - undef symbols on HPUX for ArrayJanitor
    * [XERCESC-2187] - DOM tests crash on AIX
    * [XERCESC-2189] - XMLChar with NEED_TO_GEN_TABLE has 2 buffer out of bounds \ 
reads
    * [XERCESC-2194] - Including Xerces_autoconf_config.hpp on Windows fails due \ 
to undefined ssize_t