This is a layering violation - the SocketPipe doesn't own
the socket and provides no other way to close the socket, leading
to unnecessary complexity like that in interface.py.
I looked at deamon.py and NetworkProxy - the two other users,
and they don't close the sockets explicitly, just let them be
garbage collected.
Set timeout and socket options on all simple sockets. At present
some code paths can miss it, such as when the SSL certificate is
CA-signed.
Add a missing check for failure.
This allows us to distinguish between connecting and connected
state in interface.py (used to be done in network.py but that
had other issues).
This means we don't switch to a connecting server, and get_interfaces()
does not report connecting ones.
Two callers of get_spendable_coins were removing frozen addrs
before calling. Put that functionality in the function.
We shouldn't be able to send_from a frozen address. This was
possible in the current release because logic assumed a two-element
tuple was returned when it is now three-element. Fix that too.
Command line options listunspent and createrawtransaction currently
ignore frozen addresses. I'm not sure that's right but I've preserved
that behaviour.
With this patch only the wallet class refers to self.frozen_addresses;
other clients use is_frozen() now.