updated for version 7.3.409
Problem: The license in pty.c is unclear.
Solution: Add a comment about the license.
diff --git a/src/pty.c b/src/pty.c
index 59e0069..4dad54c 100644
--- a/src/pty.c
+++ b/src/pty.c
@@ -14,6 +14,10 @@
* It has been modified to work better with Vim.
* The parts that are not used in Vim have been deleted.
* See the "screen" sources for the complete stuff.
+ *
+ * This specific version is distibuted under the Vim license (attribution by
+ * Juergen Weigert), the GPL applies to the original version, see the
+ * copyright notice below.
*/
/* Copyright (c) 1993