[libxml2] Treat URIs with scheme as absolute in C14N

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 3939178e4cb797417ff033b1e04ab4b038e224d9
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Mon Jun 12 20:06:37 2017 +0200

    Treat URIs with scheme as absolute in C14N
    
    Fixes bug 783656.

 c14n.c |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)
---
diff --git a/c14n.c b/c14n.c
index ca77f92..be687ea 100644
--- a/c14n.c
+++ b/c14n.c
@@ -1375,13 +1375,6 @@ xmlC14NCheckForRelativeNamespaces(xmlC14NCtxPtr ctx, xmlNodePtr cur)
                 xmlFreeURI(uri);
                 return (-1);
             }
-            if ((xmlStrcasecmp((const xmlChar *) uri->scheme, BAD_CAST "urn") != 0)
-                && (xmlStrcasecmp((const xmlChar *) uri->scheme, BAD_CAST "dav") !=0)
-                && (xmlStrlen((const xmlChar *) uri->server) == 0)) {
-                xmlC14NErrRelativeNamespace(uri->scheme);
-                xmlFreeURI(uri);
-                return (-1);
-            }
             xmlFreeURI(uri);
         }
         ns = ns->next;