patch 7.4.1537
Problem:    Too many feature flags for pipes, jobs and channels.
Solution:   Only use FEAT_JOB_CHANNEL.
diff --git a/src/config.h.in b/src/config.h.in
index f8475a1..9d35e48 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -432,7 +432,7 @@
 #undef FEAT_NETBEANS_INTG
 
 /* Define if you want to include process communication. */
-#undef FEAT_CHANNEL
+#undef FEAT_JOB_CHANNEL
 
 /* Define default global runtime path */
 #undef RUNTIME_GLOBAL