API logger should respect X-Forwarded-For header #9336
Description
The log output is currently insufficient to diagnose which client is at fault when Syncthing is running behind a reverse proxy:
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:44002
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:59042
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:52652
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:48306
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:40332
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:39414
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:55012
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:42518
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:44488
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:49030
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:57798
INFO: Wrong credentials supplied during API authorization from 127.0.0.1:56110
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