Revert "edc_navigator: remove redundant compatibility code."

This reverts commit e2f00759de.

src/bin/edc_navigator.c

@@ -399,6 +399,24 @@ find_part_proc_internal(char *utf8, char *utf8_end, const char* group_name,
                   ESCAPE_RET_NULL();
                }
           }
+
+        //compatibility: "part"
+        if (!strncmp("part", p, strlen("part")))
+          {
+             p = strstr((p + 4), "\"");
+             if (!p) return NULL;
+             p++;
+             if (!strncmp(part_name, p, strlen(part_name)))
+               {
+                  result = p;
+                  break;
+               }
+             else
+               {
+                  ESCAPE_RET_NULL();
+               }
+          }
+
         p++;
      }