* gnu/services/pm.scm (<thermald-configuration>): Add 'adaptive?' field.
(thermald-shepherd-service): Use it to pass --adaptive to thermald.
* doc/guix.texi (Power Management Services): Document the 'adaptive?' field of
'thermald-configuration'.

* guix/scripts/home.scm (show-help, %options): Add '--network',
'--share', and '--expose'.
(not-config?, user-shell, spawn-home-container): New procedures.
(%default-system-profile): New variable.
(perform-action): Add #:file-system-mappings, #:container-command,
and #:network?; honor them.
(process-action): Adjust accordingly.
(guix-home)[parse-sub-command]: Add "container".
[parse-args]: New procedure.
Use it instead of 'parse-command-line'.
* tests/guix-home.sh: Add tests.
* doc/guix.texi (Declaring the Home Environment): Mention 'guix home
container' as a way to test configuration.
(Invoking guix home): Document it.

* doc/guix.texi (Mail services): use correct variable name.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* doc/guix-cookbook.texi: New variable.
(Getting substitutes from Tor): Use it.

* gnu/home/services/shells.scm: Fix bash aliases not being added if
  guix-defaults? was #f. Also fix inaccuracy in documentation about placement
  of defaults.
* doc/guix.texi (Shells Home Services): Adjust accordingly.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

Until now these two actions were silently ignored.

* guix/scripts/home.scm (show-help, %options): Add "--graph-backend".
(%default-options): Add 'graph-backend' key.
(export-extension-graph, export-shepherd-graph): New procedures.
(perform-action): Add #:graph-backend parameter.  Add cases for the
'extension-graph' and 'shepherd-graph' actions.
(process-action): Pass #:graph-backend to 'perform-action'.
* guix/scripts/system.scm (service-node-type)
(shepherd-service-node-type): Export
* tests/guix-home.sh: Add tests.
* doc/guix.texi (Invoking guix home): Document it.

* doc/guix.texi (Shells Home Services): Change \" to ".

* gnu/services/ssh.scm (<openssh-configuration>)[generate-host-keys?]:
New field.
(openssh-activation): Honor it.
* doc/guix.texi (Networking Services): Document it.

* gnu/services/base.scm (<guix-configuration>)[generate-substitute-key?]:
New field.
(guix-activation): Honor it.
* doc/guix.texi (Base Services): Document it.