Disable various unused libxml features: catalogs, DocBook, legacy APIs, etc.

third_party/libxml/linux/include/libxml/xmlversion.h

Index: third_party/libxml/linux/include/libxml/xmlversion.h
diff --git a/third_party/libxml/linux/include/libxml/xmlversion.h b/third_party/libxml/linux/include/libxml/xmlversion.h
index 5a59c80dfaae946b7f2af01bfdd28d5ed5826331..18ff5ff0350884791c1ba7f9c574e352fc7f2cc4 100644
--- a/third_party/libxml/linux/include/libxml/xmlversion.h
+++ b/third_party/libxml/linux/include/libxml/xmlversion.h
@@ -210,7 +210,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the deprecated APIs are compiled in for compatibility
  */
-#if 1
+#if 0
 #define LIBXML_LEGACY_ENABLED
 #endif
 
@@ -219,7 +219,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the Canonicalization support is configured in
  */
-#if 1
+#if 0
 #define LIBXML_C14N_ENABLED
 #endif
 
@@ -228,7 +228,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the Catalog support is configured in
  */
-#if 1
+#if 0
 #define LIBXML_CATALOG_ENABLED
 #endif
 
@@ -237,7 +237,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the SGML Docbook support is configured in
  */
-#if 1
+#if 0
 #define LIBXML_DOCB_ENABLED
 #endif
 
@@ -255,7 +255,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether XPointer is configured in
  */
-#if 1
+#if 0
 #define LIBXML_XPTR_ENABLED
 #endif
 
@@ -300,7 +300,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether Debugging module is configured in
  */
-#if 1
+#if 0
 #define LIBXML_DEBUG_ENABLED
 #endif
 
@@ -336,7 +336,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the regular expressions interfaces are compiled in
  */
-#if 1
+#if 0
 #define LIBXML_REGEXP_ENABLED
 #endif
 
@@ -345,7 +345,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the automata interfaces are compiled in
  */
-#if 1
+#if 0
 #define LIBXML_AUTOMATA_ENABLED
 #endif
 
@@ -354,7 +354,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the formal expressions interfaces are compiled in
  */
-#if 1
+#if 0
 #define LIBXML_EXPR_ENABLED
 #endif
 
@@ -372,7 +372,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the Schematron validation interfaces are compiled in
  */
-#if 1
+#if 0
 #define LIBXML_SCHEMATRON_ENABLED
 #endif
 
@@ -381,7 +381,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the module interfaces are compiled in
  */
-#if 1
+#if 0
 #define LIBXML_MODULES_ENABLED
 /**
  * LIBXML_MODULE_EXTENSION:
@@ -396,7 +396,7 @@ XMLPUBFUN void XMLCALL xmlCheckVersion(int version);
  *
  * Whether the Zlib support is compiled in
  */
-#if 1
+#if 0
 #define LIBXML_ZLIB_ENABLED
 #endif