[http] HttpConnection: fix pipelined requests processing.
[http] HttpConnection: fix pipelined requests processing.

christianparpart/x0,xzero/x0,christianparpart/x0,xzero/x0,christianparpart/x0,xzero/x0,christianparpart/x0,xzero/x0,christianparpart/x0,xzero/x0,christianparpart/x0,christianparpart/x0,xzero/x0