Warning about using an excluded node for exit

Quite a few people have reported warnings in their logs when using Exclude*Nodes in their torrc. We should track down why this happens, and fix.

I opened the bug so we can keep track of ideas/problem reports. A typical log line would be [Warning] Requested exit node '..' is in ExcludeNodes or ExcludeExitNodes.. Using anyway.

[Automatically added by flyspray2trac: Operating System: All]

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