On F17 at least, every time libvirtd starts we get this in syslog:
libvirtd: Could not find keytab file: /etc/libvirt/krb5.tab: No such file or directory
This comes from cyrus-sasl, and happens regardless of whether the
gssapi plugin is requested, which is what actually uses
/etc/libvirt/krb5.tab.
While cyrus-sasl shouldn't complain, we can easily make it shut up by
commenting out the keytab value by default.
Also update the keytab comment to the more modern one from qemu's
sasl config file.
As defined in:
http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
This offers a number of advantages:
* Allows sharing a home directory between different machines, or
sessions (eg. using NFS)
* Cleanly separates cache, runtime (eg. sockets), or app data from
user settings
* Supports performing smart or selective migration of settings
between different OS versions
* Supports reseting settings without breaking things
* Makes it possible to clear cache data to make room when the disk
is filling up
* Allows us to write a robust and efficient backup solution
* Allows an admin flexibility to change where data and settings are stored
* Dramatically reduces the complexity and incoherence of the
system for administrators
Tweaked the PolicyKit documentation improvement patch submitted
by Patrick Dignan.
Additionally, removed the reference to PolicyKit.conf, which is
no longer used by PolicyKit, plus added a link to the expanded
PolicyKit example page on the wiki.
