services: sddm, slim, gdm: Take an <xorg-configuration> record.

* gnu/services/sddm.scm (<sddm-configuration>)[xorg-server-path]
[xserver-arguments]: Remove.
[xorg-configuration]: New field.
(sddm-configuration-file): Adjust accordingly.
* gnu/services/xorg.scm (<slim-configuration>)[startx]: Remove.
[xorg-configuration]: New field.
(slim-shepherd-service, slim-service): Adjust accordingly.
(<gdm-configuration>)[x-server]: Remove.
[xorg-configuration]: New field.
(gdm-shepherd-service, gdm-service): Adjust accordingly.
* doc/guix.texi (X Window): Update accordingly.

1 files changed, 4 insertions, 7 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index b49f651562..5511aaaf57 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -13223,8 +13223,8 @@ your user profile.  Failing to do that, if @code{auto-login-session} is
 false, you will be unable to log in.
 @end quotation
 
-@item @code{startx} (default: @code{(xorg-start-command)})
-The command used to start the X11 graphical server.
+@item @code{xorg-configuration} (default @code{(xorg-configuration)})
+Configuration of the Xorg graphical server.
 
 @item @code{xauth} (default: @code{xauth})
 The XAuth package to use.
@@ -13300,8 +13300,8 @@ Script to run before starting a wayland session.
 @item @code{sessions-directory} (default "/run/current-system/profile/share/wayland-sessions")
 Directory to look for desktop files starting wayland sessions.
 
-@item @code{xorg-server-path} (default @code{xorg-start-command})
-Path to xorg-server.
+@item @code{xorg-configuration} (default @code{(xorg-configuration)})
+Configuration of the Xorg graphical server.
 
 @item @code{xauth-path} (default @code{#~(string-append #$xauth "/bin/xauth")})
 Path to xauth.
@@ -13324,9 +13324,6 @@ Directory to look for desktop files starting X sessions.
 @item @code{minimum-vt} (default: 7)
 Minimum VT to use.
 
-@item @code{xserver-arguments} (default "-nolisten tcp")
-Arguments to pass to xorg-server.
-
 @item @code{auto-login-user} (default "")
 User to use for auto-login.