Why in the world should those be 500 even? Those all are "40x client fuckup". I guess someone was told, when compiling those strings, that they should observe

Why in the world should those be 500 even? Those all are "40x client fuckup". I guess someone was told, when compiling those strings, that they should observe this known-good implementation (that actually crashed upon receiving such things) and record whatever it returns, and then mandate it of everyone else from now on.