* Added new functions: xml_tree_equal and xpath2xml

* RFC 8528 yang schema mount-points:
  * Made expand_dbvar and cli_dbxml mountpoint-aware (RFC 8528)
  * autocli supportgenerate
  * Made api_path2xml and xml2api_path mount-point-aware
  * Temporar fix in clixon_custom.h: XPATH_CANONICAL_SKIP_CHECK
* `xml2xpath()`: Added `apostrophe` as 4th parameter, default 0
* removed extra assert.h includes

util/clixon_util_xpath.c

@@ -383,7 +383,7 @@ main(int    argc,
         char  *xpathi = NULL;
         for (i=0; i<xc->xc_size; i++){
             xi = xc->xc_nodeset[i];
-            if (xml2xpath(xi, nsc, 0, &xpathi) < 0)
+            if (xml2xpath(xi, nsc, 0, 0, &xpathi) < 0)
                 goto done;
             fprintf(stdout, "Inverse: %s\n", xpathi);
             if (xpathi){