services: ssh: Deprecate 'dropbear-service' procedure.

* doc/guix.texi (Networking Services): Replace 'dropbear-service' with
'dropbear-service-type'.
* gnu/services/ssh.scm (dropbear-service): Deprecate procedure.

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

doc/guix.texi

@@ -20983,19 +20983,18 @@ Match Address 192.168.0.1
 @end table
 @end deftp
 
-@deffn {Scheme Procedure} dropbear-service [@var{config}]
+@defvar dropbear-service-type
-Run the @uref{https://matt.ucc.asn.au/dropbear/dropbear.html,Dropbear SSH
+Type of the service that runs the
-daemon} with the given @var{config}, a @code{<dropbear-configuration>}
+@url{https://matt.ucc.asn.au/dropbear/dropbear.html, Dropbear SSH daemon},
-object.
+whose value is a @code{<dropbear-configuration>} object.
 
-For example, to specify a Dropbear service listening on port 1234, add
+For example, to specify a Dropbear service listening on port 1234:
-this call to the operating system's @code{services} field:
 
 @lisp
-(dropbear-service (dropbear-configuration
+(service dropbear-service-type (dropbear-configuration
-                    (port-number 1234)))
+                                 (port-number 1234)))
 @end lisp
-@end deffn
+@end defvar
 
 @deftp {Data Type} dropbear-configuration
 This data type represents the configuration of a Dropbear SSH daemon.

gnu/services/ssh.scm

@@ -52,7 +52,7 @@
             dropbear-configuration
             dropbear-configuration?
             dropbear-service-type
-            dropbear-service
+            dropbear-service  ; deprecated
 
             autossh-configuration
             autossh-configuration?
@@ -717,7 +717,9 @@ of user-name/file-like tuples."
                                           dropbear-activation)))
                 (default-value (dropbear-configuration))))
 
-(define* (dropbear-service #:optional (config (dropbear-configuration)))
+(define-deprecated (dropbear-service #:optional
+                                     (config (dropbear-configuration)))
+  dropbear-service-type
   "Run the @uref{https://matt.ucc.asn.au/dropbear/dropbear.html,Dropbear SSH
 daemon} with the given @var{config}, a @code{<dropbear-configuration>}
 object."