patch 7.4.1537
Problem:    Too many feature flags for pipes, jobs and channels.
Solution:   Only use FEAT_JOB_CHANNEL.
diff --git a/src/macros.h b/src/macros.h
index 7b7b17d..ca54cb4 100644
--- a/src/macros.h
+++ b/src/macros.h
@@ -317,7 +317,7 @@
 # define PLINES_NOFILL(x) plines(x)
 #endif
 
-#if defined(FEAT_CHANNEL) || defined(FEAT_JOB) || defined(FEAT_CLIENTSERVER)
+#if defined(FEAT_JOB_CHANNEL) || defined(FEAT_CLIENTSERVER)
 # define MESSAGE_QUEUE
 #endif