Unfortunately, chroot() works only for root user, because of attacks
on setuid binaries (make DIR/lib/ld-linux.so a shell, hardlink to
a setuid binary, chroot to DIR, execute it and get root shell).
function old new delta
ftpd_main 2160 2180 +20
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>