channel_close: no longer wait for the SSH_MSG_CHANNEL_CLOSE message
channel_close: no longer wait for the SSH_MSG_CHANNEL_CLOSE message

As the packet may simply not arrive we cannot have the close
function wait for it unconditionally.

libssh2/libssh2,libssh2/libssh2,libssh2/libssh2,libssh2/libssh2