Revert "Actually use the XML catalog from org/xmlresolver/catalog.xml"

This reverts commit d200c5d276948933cc31e678c71e7c2d3b4bd135.
diff --git a/lib/dtds/xhtml11/xhtml-special.ent b/lib/dtds/xhtml11/xhtml-special.ent
new file mode 100644
index 0000000..0af4654
--- /dev/null
+++ b/lib/dtds/xhtml11/xhtml-special.ent
@@ -0,0 +1,82 @@
+<!-- ...................................................................... -->
+<!-- XML-compatible ISO Special Character Entity Set for XHTML ............ -->
+<!-- file: xhtml-special.ent
+
+     Typical invocation:
+
+       <!ENTITY % xhtml-special
+           PUBLIC "-//W3C//ENTITIES Special for XHTML//EN"
+                  "xhtml-special.ent" >
+       %xhtml-special;
+
+     This DTD module is identified by the PUBLIC and SYSTEM identifiers:
+
+       PUBLIC "-//W3C//ENTITIES Special for XHTML//EN"
+       SYSTEM "http://www.w3.org/MarkUp/DTD/xhtml-special.ent"
+
+     Revision:  $Id: xhtml-special.ent,v 4.1 2001/04/10 09:34:14 altheim Exp $ SMI
+
+     Portions (C) International Organization for Standardization 1986:
+     Permission to copy in any form is granted for use with conforming
+     SGML systems and applications as defined in ISO 8879, provided
+     this notice is included in all copies.
+
+     Revisions:
+2000-10-28: added &apos; and altered XML Predefined Entities for compatibility
+-->
+
+<!-- Relevant ISO entity set is given unless names are newly introduced.
+     New names (i.e., not in ISO 8879 [SGML] list) do not clash with
+     any existing ISO 8879 entity names. ISO 10646 [ISO10646] character
+     numbers are given for each character, in hex. Entity values are
+     decimal conversions of the ISO 10646 values and refer to the
+     document character set. Names are Unicode [UNICODE] names.
+-->
+
+<!-- C0 Controls and Basic Latin -->
+<!ENTITY lt      "&#38;#60;" ><!-- less-than sign, U+003C ISOnum -->
+<!ENTITY gt      "&#62;" ><!-- greater-than sign, U+003E ISOnum -->
+<!ENTITY amp     "&#38;#38;" ><!-- ampersand, U+0026 ISOnum -->
+<!ENTITY apos    "&#39;" ><!-- The Apostrophe (Apostrophe Quote, APL Quote), U+0027 ISOnum -->
+<!ENTITY quot    "&#34;" ><!-- quotation mark (Quote Double), U+0022 ISOnum -->
+
+<!-- Latin Extended-A -->
+<!ENTITY OElig   "&#338;" ><!-- latin capital ligature OE, U+0152 ISOlat2 -->
+<!ENTITY oelig   "&#339;" ><!-- latin small ligature oe, U+0153 ISOlat2 -->
+
+<!-- ligature is a misnomer, this is a separate character in some languages -->
+<!ENTITY Scaron  "&#352;" ><!-- latin capital letter S with caron, U+0160 ISOlat2 -->
+<!ENTITY scaron  "&#353;" ><!-- latin small letter s with caron, U+0161 ISOlat2 -->
+<!ENTITY Yuml    "&#376;" ><!-- latin capital letter Y with diaeresis, U+0178 ISOlat2 -->
+
+<!-- Spacing Modifier Letters -->
+<!ENTITY circ    "&#710;" ><!-- modifier letter circumflex accent, U+02C6 ISOpub -->
+<!ENTITY tilde   "&#732;" ><!-- small tilde, U+02DC ISOdia -->
+
+<!-- General Punctuation -->
+<!ENTITY ensp    "&#8194;" ><!-- en space, U+2002 ISOpub -->
+<!ENTITY emsp    "&#8195;" ><!-- em space, U+2003 ISOpub -->
+<!ENTITY thinsp  "&#8201;" ><!-- thin space, U+2009 ISOpub -->
+<!ENTITY zwnj    "&#8204;" ><!-- zero width non-joiner, U+200C NEW RFC 2070 -->
+<!ENTITY zwj     "&#8205;" ><!-- zero width joiner, U+200D NEW RFC 2070 -->
+<!ENTITY lrm     "&#8206;" ><!-- left-to-right mark, U+200E NEW RFC 2070 -->
+<!ENTITY rlm     "&#8207;" ><!-- right-to-left mark, U+200F NEW RFC 2070 -->
+<!ENTITY ndash   "&#8211;" ><!-- en dash, U+2013 ISOpub -->
+<!ENTITY mdash   "&#8212;" ><!-- em dash, U+2014 ISOpub -->
+<!ENTITY lsquo   "&#8216;" ><!-- left single quotation mark, U+2018 ISOnum -->
+<!ENTITY rsquo   "&#8217;" ><!-- right single quotation mark, U+2019 ISOnum -->
+<!ENTITY sbquo   "&#8218;" ><!-- single low-9 quotation mark, U+201A NEW -->
+<!ENTITY ldquo   "&#8220;" ><!-- left double quotation mark, U+201C ISOnum -->
+<!ENTITY rdquo   "&#8221;" ><!-- right double quotation mark, U+201D ISOnum -->
+<!ENTITY bdquo   "&#8222;" ><!-- double low-9 quotation mark, U+201E NEW -->
+<!ENTITY dagger  "&#8224;" ><!-- dagger, U+2020 ISOpub -->
+<!ENTITY Dagger  "&#8225;" ><!-- double dagger, U+2021 ISOpub -->
+<!ENTITY permil  "&#8240;" ><!-- per mille sign, U+2030 ISOtech -->
+
+<!-- lsaquo is proposed but not yet ISO standardized -->
+<!ENTITY lsaquo  "&#8249;" ><!-- single left-pointing angle quotation mark, U+2039 ISO proposed -->
+<!-- rsaquo is proposed but not yet ISO standardized -->
+<!ENTITY rsaquo  "&#8250;" ><!-- single right-pointing angle quotation mark, U+203A ISO proposed -->
+<!ENTITY euro    "&#8364;" ><!-- euro sign, U+20AC NEW -->
+
+<!-- end of xhtml-special.ent -->