Update to 1.31:

* 2007-09-06: version 1.31

- support CIDR-style addresses in the client whitelist (Claudio Strizzolo)
- improve logging of unresolveable hosts (Adrian von Bidder, Heiko
  Schlichting)
- updated whitelist
- fix unix socket permission issues (Martin F Krafft, Adrian von Bidder,
  Leos Bitto, Debian bug #376910)
- fix regexps for matching hosts in whitelists (Antonello Nocchi)
- do maintenance after the current request and not before (Clifton Royston)

(xtraeme)