MySQLi: connect_error returns last error (fix #2554)

Author: vrana

reference/mysqli/mysqli/connect-errno.xml

@@ -32,6 +32,10 @@
    An error code for the last connection attempt, if it failed.
    Zero means no error occurred.
   </para>
+  <para>
+   Returns the last connection error code regardless of the instance on which it
+   is called.
+  </para>
  </refsect1>
 
  <refsect1 role="examples">

reference/mysqli/mysqli/connect-error.xml

@@ -31,6 +31,10 @@
   <para>
    A string that describes the error. &null; is returned if no error occurred.
   </para>
+  <para>
+   Returns the last connection error regardless of the instance on which it is
+   called.
+  </para>
  </refsect1>
 
  <refsect1 role="examples">