patch 7.4.2270

Problem:    Insufficient testing for NUL bytes on a raw channel.
Solution:   Add a test for writing and reading.

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2270,
 /**/
     2269,
 /**/