patch 7.4.1286

Problem:    ch_open() with a timeout doesn't work correctly.
Solution:   Change how select() is used.  Don't give an error on timeout.
            Add a test for ch_open() failing.

src/version.c

@@ -747,6 +747,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1286,
 /**/
     1285,
 /**/