upgraded luajit to v2.1-20140305, lua-cjson to 2.1.0.1, lua-resty-core to 0.0.4, lua-resty-redis to 0.20, and ngx_lua to 0.9.5; bundled the ngx_lua_upstream module and the lua-resty-upstream-healthcheck library.
upgraded lua-resty-redis to 0.20 for real this time.