#27 Adds admin_localhost option to 0.7.12

[Anonymous]

Currently, the user has the option to listen on all
interface for admin port connections or to disable it
complettely. With this patch, the user can choose to
enable the admin port but only allow connections from
localhost. This can also be used to force admins to
connect through an encrypted tunnel such as using "stunnel"

[Nobody/Anonymous]

admin_localhost patch for 0.7.12