MEDIUM: config: propagate the table's process list to the peers sections

Now a peers section has its bind_proc set to the union of all those of
its users.
diff --git a/src/peers.c b/src/peers.c
index 59f934d..9cc4e0d 100644
--- a/src/peers.c
+++ b/src/peers.c
@@ -1097,6 +1097,7 @@
 	fe->accept = frontend_accept;
 	fe->default_target = &peer_applet.obj_type;
 	fe->options2 |= PR_O2_INDEPSTR | PR_O2_SMARTCON | PR_O2_SMARTACC;
+	fe->bind_proc = 0; /* will be filled by users */
 }
 
 /*