Omit stale check in AsyncSocket::isZeroCopyMsg
Omit stale check in AsyncSocket::isZeroCopyMsg

Summary: Do not check zeroCopyEnabled_ in AsyncSocket::isZeroCopyMsg to avoid an IOBuf leak when zeroCopyEnabled_ changes from true to false

Reviewed By: yfeldblum

Differential Revision: D10285664

fbshipit-source-id: 5f13426f6140668d029a89786eb9a92466d4b1f4

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly