reuse array to store cert/pkey

Author: chronolaw

src/ngx_http_lua_socket_tcp.c

@@ -160,6 +160,8 @@ enum {
     SOCKET_CONNECT_TIMEOUT_INDEX = 2,
     SOCKET_SEND_TIMEOUT_INDEX = 4,
     SOCKET_READ_TIMEOUT_INDEX = 5,
+    SOCKET_CLIENT_CERT_INDEX = 6 ,
+    SOCKET_CLIENT_PKEY_INDEX   = 7 ,
 };
 
 
@@ -424,7 +426,7 @@ ngx_http_lua_socket_tcp(lua_State *L)
 
     ngx_http_lua_check_context(L, ctx, NGX_HTTP_LUA_CONTEXT_YIELDABLE);
 
-    lua_createtable(L, 5 /* narr */, 3 /* nrec */);
+    lua_createtable(L, 7 /* narr */, 1 /* nrec */);
     lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
                           tcp_socket_metatable_key));
     lua_rawget(L, LUA_REGISTRYINDEX);