According to this page,

The client will automatically read a file named "addr.txt" in the bitcoin data directory and will add any addresses it finds in there as node addresses.

However, I can't find any point in the source code where this file is actually read, and I don't know how to verify all the peers known by my node.

Is the "addr.txt" file actually read by bitcoind? How can I check if the addresses are actually loaded?