patch 7.4.1537
Problem:    Too many feature flags for pipes, jobs and channels.
Solution:   Only use FEAT_JOB_CHANNEL.
diff --git a/src/auto/configure b/src/auto/configure
index bf0bfee..a708230 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -7427,7 +7427,7 @@
 
 fi
 if test "$enable_channel" = "yes"; then
-  $as_echo "#define FEAT_CHANNEL 1" >>confdefs.h
+  $as_echo "#define FEAT_JOB_CHANNEL 1" >>confdefs.h
 
   CHANNEL_SRC="channel.c"