services: dhcp-client-configuration: Add 'shepherd-requirement' field.

* gnu/services/networking.scm (<dhcp-client-configuration>)
[shepherd-requirement]: New field.
(dhcp-client-shepherd-service): Honor it.
(dhcp-client-configuration-shepherd-requirement): Export accessor.
* doc/guix.texi (Networking Setup): Document it.

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

1 files changed, 7 insertions, 1 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 27fc3b1689..2871fb9957 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -20000,6 +20000,12 @@ should listen on---e.g., @code{'("eno1")}.
 When set to @code{'all}, the DHCP client listens on all the available
 non-loopback interfaces that can be activated.  Otherwise the DHCP
 client listens only on the specified interfaces.
+
+@item @code{shepherd-requirement} (default: @code{'()})
+This option can be used to provide a list of symbols naming Shepherd services
+that this service will depend on, such as @code{'wpa-supplicant} or
+@code{'iwd} if you require authenticated access for encrypted WiFi or Ethernet
+networks.
 @end table
 @end deftp
 
@@ -20103,7 +20109,7 @@ Data Type representing the configuration of connman.
 @item @code{connman} (default: @var{connman})
 The connman package to use.
 
-@item @code{shepherd-requirement} (default: @code{()})
+@item @code{shepherd-requirement} (default: @code{'()})
 This option can be used to provide a list of symbols naming Shepherd services
 that this service will depend on, such as @code{'wpa-supplicant} or
 @code{'iwd} if you require authenticated access for encrypted WiFi or Ethernet