* doc/guix.texi (Using the Configuration System): Add xref to "X.509
Certificates".
(X.509 Certificates): New section.
* gnu/system/examples/desktop.tmpl: Use NSS-CERTS.
* gnu/system/examples/bare-bones.tmpl: Change 'packages' and
'host-name'. Remove D-Bus, Avahi, and SLiM services, and add lsh
instead.
* gnu/system/examples/desktop.tmpl: New file.
* Makefile.am (EXAMPLES): Add it.