+dit(Erasing an entry)
+The command bf('del foo') can be used to erase any of the entries settable by
+the user. The erasable attributes are: c, l, facsimiletelephonenumber,
+telephonenumber, postaladdress, postalcode, emailforward, ircnick,
+onvacation, labeledurl, latitude, longitude, and sshrsaauthkey.
+