Start invalidator after locking pidfile
Start invalidator after locking pidfile

This causes the pidfile to be written as the first thing after
daemonising nslcd to minimise the race between service script completion
and pidfile being locked.

arthurdejong/nss-pam-ldapd,arthurdejong/nss-pam-ldapd,arthurdejong/nss-pam-ldapd