Merge pull request #38 from moteus/master

Change. `multi:iperform` unset callback functions for easy handles.

Author: moteus

src/lua/cURL/impl/cURL.lua

@@ -104,6 +104,8 @@ local function make_iterator(self, perform)
  buffers:append(e, "done", ok)
  else buffers:append(e, "error", err) end
  self:remove_handle(e)
+ e:unsetopt_headerfunction()
+ e:unsetopt_writefunction()
  end
  end
 
@@ -384,6 +386,8 @@ function Multi:add_handle(e)
  local ok, err = add_handle(self, h)
  if not ok then return nil, err end
  self._easy[h], self._easy.n = e, self._easy.n + 1
+ self._easy_mark = nil
+
  return self
 end