closes https://github.com/official-stockfish/Stockfish/pull/4746
No functional change
Arjun Temurnikar
Artem Solopiy (EntityFX)
Auguste Pop
+Balazs Szilagyi
Balint Pfliegel
Ben Chaney (Chaneybenjamini)
Ben Koshy (BKSpurgeon)
// frequent adjacent pair of symbols in the source message by a new symbol,
// reevaluating the frequencies of all of the symbol pairs with respect to
// the extended alphabet, and then repeating the process.
- // See http://www.larsson.dogma.net/dcc99.pdf
+ // See https://web.archive.org/web/20201106232444/http://www.larsson.dogma.net/dcc99.pdf
std::vector<bool> visited(d->symlen.size());
for (Sym sym = 0; sym < d->symlen.size(); ++sym)