fix params check in sslhandshake

Author: chronolaw

lib/resty/core/socket.lua

@@ -183,7 +183,7 @@ local function sslhandshake(cosocket, reused_session, server_name, ssl_verify,
     send_status_req, ...)
 
     local n = select("#", ...)
-    if not cosocket or n > 1 then
+    if not cosocket or n > 0 then
         error("ngx.socket sslhandshake: expecting 1 ~ 5 arguments " ..
               "(including the object), but seen " .. (cosocket and 5 + n or 0))
     end