patch 7.4.1304

Problem:    Function names are difficult to read.
Solution:   Rename jsonencode to json_encode, jsondecode to json_decode,
            jsencode to js_encode and jsdecode to js_decode.

src/version.c

@@ -747,6 +747,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1304,
 /**/
     1303,
 /**/