*: make GNU licensing statement forms more regular

This change retains "or later" state! No licensing _changes_ here,
only form is adjusted (article, space between "GPL" and "v2" and so on).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/sysklogd/syslogd_and_logger.c b/sysklogd/syslogd_and_logger.c
index 51573bd..0964f23 100644
--- a/sysklogd/syslogd_and_logger.c
+++ b/sysklogd/syslogd_and_logger.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 2008 by Denys Vlasenko <vda.linux@gmail.com>
  *
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 
 #include "libbb.h"