Issue #9729: Fix the signature of SSLSocket.recvfrom() and

Issue #9729: Fix the signature of SSLSocket.recvfrom() and
SSLSocket.sendto() to match the corresponding socket methods.  Also,
fix various SSLSocket methods to raise socket.error rather than an
unhelpful TypeError when called on an unconnected socket.  Original patch
by Andrew Bennetts.

NOTE: obviously, these methods are untested and unused in the real world...