The libtxml it ships seems to be an expat derivative. torcs-1.3.1/src/libs/txml/ torcs-1.3.1/src/libs/txml/txml.def torcs-1.3.1/src/libs/txml/iasciitab.h torcs-1.3.1/src/libs/txml/xmldef.h torcs-1.3.1/src/libs/txml/xmlparse.c torcs-1.3.1/src/libs/txml/xml.cpp torcs-1.3.1/src/libs/txml/dllmain.c torcs-1.3.1/src/libs/txml/CVS/ torcs-1.3.1/src/libs/txml/CVS/Entries torcs-1.3.1/src/libs/txml/CVS/Repository torcs-1.3.1/src/libs/txml/CVS/Entries.Log torcs-1.3.1/src/libs/txml/CVS/Tag torcs-1.3.1/src/libs/txml/CVS/Root torcs-1.3.1/src/libs/txml/xmltok.h torcs-1.3.1/src/libs/txml/gennmtab/ torcs-1.3.1/src/libs/txml/gennmtab/CVS/ torcs-1.3.1/src/libs/txml/gennmtab/CVS/Entries torcs-1.3.1/src/libs/txml/gennmtab/CVS/Repository torcs-1.3.1/src/libs/txml/gennmtab/CVS/Tag torcs-1.3.1/src/libs/txml/gennmtab/CVS/Root torcs-1.3.1/src/libs/txml/gennmtab/gennmtab.c torcs-1.3.1/src/libs/txml/gennmtab/Makefile torcs-1.3.1/src/libs/txml/hashtable.h torcs-1.3.1/src/libs/txml/xmlrole.h torcs-1.3.1/src/libs/txml/xmltok.c torcs-1.3.1/src/libs/txml/nametab.h torcs-1.3.1/src/libs/txml/txml.dsp torcs-1.3.1/src/libs/txml/latin1tab.h torcs-1.3.1/src/libs/txml/gennmtab.c torcs-1.3.1/src/libs/txml/asciitab.h torcs-1.3.1/src/libs/txml/filemap.h torcs-1.3.1/src/libs/txml/xmlrole.c torcs-1.3.1/src/libs/txml/hashtable.c torcs-1.3.1/src/libs/txml/codepage.h torcs-1.3.1/src/libs/txml/utf8tab.h torcs-1.3.1/src/libs/txml/xml.h torcs-1.3.1/src/libs/txml/xmltok_impl.h torcs-1.3.1/src/libs/txml/Makefile torcs-1.3.1/src/libs/txml/xmlparse.h torcs-1.3.1/src/libs/txml/xmltok_impl.c
1.3.3 version blames to fix security issues: http://torcs.sourceforge.net/index.php?name=News&file=article&sid=79