patch 7.4.2189

Problem:    Cannot detect encoding in a fifo.
Solution:   Extend the stdin way of detecting encoding to fifo.  Add a test
            for detecting encoding on stdin and fifo. (Ken Takata)

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2189,
 /**/
     2188,
 /**/