Message3516

Fix checked into trunk and release 2.2 branch.

The socket module now has an SO_ERROR constant, so AttributeError should
no longer occur.

However, the constant has no usage on the JVM, because SO_ERROR is not
supported.

Attempts to use the constant as a parameter to getsockopt will result in
a socket.error exception, with errno == errno.ENOPROTOOPT, as occurs
with all other unsupported socket options on jython.

Thanks for submitting this bug.