Revision 1902312

apr_socket_sendv: WIN32: Limit the number of WSABUFs allocated for a single call.

* network_io/win32/sendrecv.c():
  Define WSABUF_ON_HEAP to 500.

* network_io/win32/sendrecv.c(apr_socket_sendv):
  Do not sendv more than WSABUF_ON_HEAP WSABUFs.

[Reverted by r1904714]