Update license description (fixes vim-jp#84) [skip ci]

rhysd · rhysd · commit f1bb77c55310 · 2018-05-08T19:09:28.000+09:00
diff --git a/LICENSE b/LICENSE
@@ -1,2 +1,4 @@
-To the extent possible under law, Yukihiro Nakadaira has waived all copyright and 
-related or neighboring rights to VimL parser.
+All files in this repository are distributed in the Public Domain. To the extent
+possible under law, Yukihiro Nakadaira (original author) has waived all copyright
+and related or neighboring rights to VimL parser.
+Please utilize this software at your own risk.
