services: base: Deprecate 'mingetty-service' procedure.

* doc/guix.texi (Base Services): Replace mingetty-service with
mingetty-service-type.
* gnu/services/base.scm (mingetty-service): Deprecate procedure.

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

doc/guix.texi

@@ -18123,18 +18123,17 @@ the 'root' account has just been created.
 @end table
 @end deftp
 
-@deffn {Scheme Procedure} mingetty-service @var{config}
-Return a service to run mingetty according to @var{config}, a
-@code{<mingetty-configuration>} object, which specifies the tty to run, among
-other things.
-@end deffn
+@defvar mingetty-service-type
+Type of the service that runs Mingetty, an implementation of the
+virtual console log-in.  The value for this service is a
+@code{<mingetty-configuration>} object.
+@end defvar
 
 @deftp {Data Type} mingetty-configuration
-This is the data type representing the configuration of Mingetty, which
-provides the default implementation of virtual console log-in.
+Data type representing the configuration of Mingetty, which specifies
+the tty to run, among other things.
 
 @table @asis
-
 @item @code{tty}
 The name of the console this Mingetty runs on---e.g., @code{"tty1"}.
 

gnu/services/base.scm

@@ -173,7 +173,7 @@
             mingetty-configuration-clear-on-logout?
             mingetty-configuration-mingetty
             mingetty-configuration?
-            mingetty-service
+            mingetty-service  ; deprecated
             mingetty-service-type
 
             %nscd-default-caches
@@ -1275,7 +1275,8 @@ the tty to run, among other things."
                  "Provide console login using the @command{mingetty}
 program.")))
 
-(define* (mingetty-service config)
+(define-deprecated (mingetty-service config)
+  mingetty-service-type
   "Return a service to run mingetty according to @var{config}, which specifies
 the tty to run, among other things."
   (service mingetty-service-type config))

gnu/system/install.scm

@@ -331,7 +331,8 @@ Using this shell, you can carry out the installation process \"manually.\"
 Access documentation at any time by pressing Alt-F2.\x1b[0m
 ")))
     (define (normal-tty tty)
-      (mingetty-service (mingetty-configuration (tty tty)
+      (service mingetty-service-type
+               (mingetty-configuration (tty tty)
                                        (auto-login "root")
                                        (login-pause? #t))))