patch 7.4.1810

Problem:    Sending DETACH after a channel was closed isn't useful.
Solution:   Only add DETACH for a netbeans channel.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1810,
 /**/
     1809,
 /**/