lug-bg: mlock DEBIAN wornings

[Nikodim Nikodimov]

Poluchavam slednite preduprejdenia pri checking na pop3 account:   Oct 24 18:19:02 debian ipop3d[2250]: Logout user=dizma host=localhost [127.0.0.1] nmsgs=4 ndele=0 Oct 24 18:19:11 debian /usr/bin/mlock[2257]: (64) name not regular file   Niakoi da go e sreshtal?   NN