damn XML_FEATURE_UNICODE clashes with Expat headers rename to XML_WITH_ to

* include/libxml/parser.h parser.c xmllint.c: damn XML_FEATURE_UNICODE
  clashes with Expat headers rename to XML_WITH_ to fix bug #316053.
* doc/Makefile.am: build devhelp before the examples.
* doc/*: regenerated the API
Daniel
diff --git a/parser.c b/parser.c
index 9c7247c..ce6e003 100644
--- a/parser.c
+++ b/parser.c
@@ -601,181 +601,181 @@
 xmlHasFeature(xmlFeature feature)
 {
     switch (feature) {
-	case XML_FEATURE_THREAD:
+	case XML_WITH_THREAD:
 #ifdef LIBXML_THREAD_ENABLED
 	    return(1);
 #else
 	    return(0);
 #endif
-        case XML_FEATURE_TREE:
+        case XML_WITH_TREE:
 #ifdef LIBXML_TREE_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_OUTPUT:
+        case XML_WITH_OUTPUT:
 #ifdef LIBXML_OUTPUT_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_PUSH:
+        case XML_WITH_PUSH:
 #ifdef LIBXML_PUSH_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_READER:
+        case XML_WITH_READER:
 #ifdef LIBXML_READER_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_PATTERN:
+        case XML_WITH_PATTERN:
 #ifdef LIBXML_PATTERN_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_WRITER:
+        case XML_WITH_WRITER:
 #ifdef LIBXML_WRITER_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_SAX1:
+        case XML_WITH_SAX1:
 #ifdef LIBXML_SAX1_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_FTP:
+        case XML_WITH_FTP:
 #ifdef LIBXML_FTP_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_HTTP:
+        case XML_WITH_HTTP:
 #ifdef LIBXML_HTTP_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_VALID:
+        case XML_WITH_VALID:
 #ifdef LIBXML_VALID_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_HTML:
+        case XML_WITH_HTML:
 #ifdef LIBXML_HTML_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_LEGACY:
+        case XML_WITH_LEGACY:
 #ifdef LIBXML_LEGACY_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_C14N:
+        case XML_WITH_C14N:
 #ifdef LIBXML_C14N_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_CATALOG:
+        case XML_WITH_CATALOG:
 #ifdef LIBXML_CATALOG_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_XPATH:
+        case XML_WITH_XPATH:
 #ifdef LIBXML_XPATH_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_XPTR:
+        case XML_WITH_XPTR:
 #ifdef LIBXML_XPTR_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_XINCLUDE:
+        case XML_WITH_XINCLUDE:
 #ifdef LIBXML_XINCLUDE_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_ICONV:
+        case XML_WITH_ICONV:
 #ifdef LIBXML_ICONV_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_ISO8859X:
+        case XML_WITH_ISO8859X:
 #ifdef LIBXML_ISO8859X_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_UNICODE:
+        case XML_WITH_UNICODE:
 #ifdef LIBXML_UNICODE_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_REGEXP:
+        case XML_WITH_REGEXP:
 #ifdef LIBXML_REGEXP_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_AUTOMATA:
+        case XML_WITH_AUTOMATA:
 #ifdef LIBXML_AUTOMATA_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_EXPR:
+        case XML_WITH_EXPR:
 #ifdef LIBXML_EXPR_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_SCHEMAS:
+        case XML_WITH_SCHEMAS:
 #ifdef LIBXML_SCHEMAS_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_SCHEMATRON:
+        case XML_WITH_SCHEMATRON:
 #ifdef LIBXML_SCHEMATRON_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_MODULES:
+        case XML_WITH_MODULES:
 #ifdef LIBXML_MODULES_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_DEBUG:
+        case XML_WITH_DEBUG:
 #ifdef LIBXML_DEBUG_ENABLED
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_DEBUG_MEM:
+        case XML_WITH_DEBUG_MEM:
 #ifdef DEBUG_MEMORY_LOCATION
             return(1);
 #else
             return(0);
 #endif
-        case XML_FEATURE_DEBUG_RUN:
+        case XML_WITH_DEBUG_RUN:
 #ifdef LIBXML_DEBUG_RUNTIME
             return(1);
 #else