MINOR: ssl/cli: display warning during 'commit ssl cert'

Display the warnings on the CLI during a commit of the certificates.
diff --git a/src/ssl_sock.c b/src/ssl_sock.c
index 27b9e09..6513760 100644
--- a/src/ssl_sock.c
+++ b/src/ssl_sock.c
@@ -10200,7 +10200,10 @@
 	}
 end:
 
-	chunk_appendf(trash, "\nSuccess!\n");
+	chunk_appendf(trash, "\n");
+	if (errcode & ERR_WARN)
+		chunk_appendf(trash, err);
+	chunk_appendf(trash, "Success!\n");
 	if (ci_putchk(si_ic(si), trash) == -1)
 		si_rx_room_blk(si);
 	free_trash_chunk(trash);