change: allowing both ngx_lua 0.10.16 and 0.10.17.

Author: agentzh

README.markdown

@@ -108,7 +108,7 @@ of this library in the particular OpenResty release you are using. Otherwise you
 into serious compatibility issues.
 
 * LuaJIT 2.1 (for now, it is the v2.1 git branch in the official luajit-2.0 git repository: http://luajit.org/download.html )
-* [ngx_http_lua_module](https://github.com/openresty/lua-nginx-module) v0.10.16.
+* [ngx_http_lua_module](https://github.com/openresty/lua-nginx-module) v0.10.16 or v0.10.17.
 * [ngx_stream_lua_module](https://github.com/openresty/stream-lua-nginx-module) v0.0.8.
 * [lua-resty-lrucache](https://github.com/openresty/lua-resty-lrucache)
 

lib/resty/core/base.lua

@@ -16,11 +16,12 @@ local FREE_LIST_REF = 0
 
 
 if subsystem == 'http' then
+    local ngx_lua_v = ngx.config.ngx_lua_version
     if not ngx.config
        or not ngx.config.ngx_lua_version
-       or ngx.config.ngx_lua_version ~= 10016
+       or (ngx_lua_v ~= 10016 and ngx_lua_v ~= 10017)
     then
-        error("ngx_http_lua_module 0.10.16 required")
+        error("ngx_http_lua_module 0.10.16 or 0.10.17 required")
     end
 
 elseif subsystem == 'stream' then