Make librsvg always allow possibly ill-formed documents.

rsvg-xml-huge

diff --git a/rsvg-base.c b/rsvg-base.c
index 6210716..fe9a6cb 100644
--- a/rsvg-base.c
+++ b/rsvg-base.c
@@ -1111,6 +1111,7 @@ rsvg_handle_write_impl (RsvgHandle * handle, const guchar * buf, gsize count, GE
     if (handle->priv->ctxt == NULL) {
         handle->priv->ctxt = xmlCreatePushParserCtxt (&rsvgSAXHandlerStruct, handle, NULL, 0,
                                                       rsvg_handle_get_base_uri (handle));
+        handle->priv->ctxt->options |= XML_PARSE_HUGE;

         /* if false, external entities work, but internal ones don't. if true, internal entities
            work, but external ones don't. favor internal entities, in order to not cause a
@@ -1767,6 +1768,7 @@ rsvg_handle_read_stream_sync (RsvgHandle   *handle,
     if (priv->ctxt == NULL) {
         priv->ctxt = xmlCreatePushParserCtxt (&rsvgSAXHandlerStruct, handle, NULL, 0,
                                               rsvg_handle_get_base_uri (handle));
+        handle->priv->ctxt->options |= XML_PARSE_HUGE;

         /* if false, external entities work, but internal ones don't. if true, internal entities
            work, but external ones don't. favor internal entities, in order to not cause a