Are you people serious? His code is absolutely disgusting:
uugh = constmap(&mapuser,x,i);
if (!uugh) die_user(x,i);
++i; x += i; xlen -= i; i = byte_chr(x,xlen,':'); if (i == xlen) return;
It's mostly bug-free because it scares bugs away. If I was a bug I wouldn't want to live in there.