* gnu/system/examples/desktop.tmpl: Add 'mapped-devices' field.
Use it in 'file-systems'.
* doc/guix.texi (System Installation): Suggest encrypted partitions.
Give an example of a command sequence.
* gnu/system/shadow.scm (%base-user-accounts): New variable.
* gnu/system.scm (<operating-system>)[users]: Use it as the default value.
* gnu/system/examples/bare-bones.tmpl (users): Use it.
* gnu/system/examples/desktop.tmpl (users): Likewise.
* doc/guix.texi (operating-system Reference, User Accounts): Adjust
accordingly.
* 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.