SimpleAdmin upserts sa_players_ips on (steamid, address), so a rename on
the same IP overwrites the old name. sql/players-ips-name-history.sql adds
name to the primary key (binary collation, NOT NULL), so every name a
SteamID joins with is kept and shows on its player page and in name
search. SimpleAdmin's IP cache keeps only the newest row per IP, so its
multi-account and IP-ban checks are unchanged. The file includes a revert.
