Log Message:
Update squid package to 2.5.9 (2.5.STABLE9).

There is no runtime change from 2.5.8nb3.

- Fix for a wrong configure warning on Solaris 9 x86 when enabling ARP
  ACl support: The effective host type is i386-pc-solaris2.9.

- Documentation update for squid 2.5.STALBE9.