Hello,

Got unexpected behavior when trying to run bitcoind with -proxy setting.
-proxy is used to connect to SOCKS5 proxy which is able to access some internal 
network.
bitcoind is started with -noconnect option and network activity is absent (as 
it should be).

Then I command bitcoin-cli to connect to node with address 10.x.y.z with the 
command
bitcoin-cli addnode 10.x.y.z add

Expected behavior is for bitcoind to initiate connection through proxy.
Actual behavior is bitcoind trying to connect without using proxy.

In the code:
CConnman::ConnectNode calls GetProxy and GetProxy returns false because 
CNetAddr::GetNetwork returns NET_UNROUTABLE.

My take is this is unexpected behavior at minimum and should be documented.
Better way is to introduce another option just for the unroutable addresses:
- connect locally (for compatibility reasons, default);
- connect thru proxy;
- don't connect to unroutable addresses.


--  Anton Shevchenko
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