rpatricia license to LGPLv2.1+

Tatsuya Mori and I (Eric Wong) both agreed to license our
contributions to rpatricia under LGPLv2.1+.  Document our copyrights
and set the licenses field in the gemspec.

The original 2-clause BSD license and copyright from MRT is retained
for patricia.[ch] and explicitly documented in COPYING.  The old,
top-level copyright file was already out-of-date since we imported
the new copyright in commit 92cebfe6c81e513d24f7192328ee6b7c9d01a929

Thanks to Apollon Oikonomopoulos for all the help.

1 files changed, 1 insertions, 0 deletions

diff --git a/rpatricia.gemspec b/rpatricia.gemspec
index 52b081a..32323f7 100644
--- a/rpatricia.gemspec
+++ b/rpatricia.gemspec
@@ -40,4 +40,5 @@ rpatricia.gemspec
 test.rb
 )
   s.extensions = %w(ext/rpatricia/extconf.rb)
+  s.licenses = %w(LGPLv2.1+)
 end