Add missing copylefts; improve docs

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/md5.h b/lib/md5.h
index ffbdfb3..19c6756 100644
--- a/lib/md5.h
+++ b/lib/md5.h
@@ -1,3 +1,20 @@
+/* This file is part of Ping903
+   Copyright (C) 2020 Sergey Poznyakoff
+  
+   Ping903 is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+  
+   Ping903 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+  
+   You should have received a copy of the GNU General Public License
+   along with Ping903.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 struct MD5Context {
         uint32_t buf[4];
         uint32_t bits[2];