services: lsh: Change #:initialize? to default to #t.

* gnu/services/ssh.scm (lsh-service): Change #:initialize? to default
  to #t.
* doc/guix.texi (Using the Configuration System): Remove #:initialize? #t
  from example.
  (Networking Services): Adjust accordingly.

doc/guix.texi

@@ -3776,8 +3776,7 @@ kernel, initial RAM disk, and boot loader looks like this:
                 (comment "Bob's sister")
                 (home-directory "/home/alice"))))
   (packages (cons emacs %base-packages))
-  (services (cons (lsh-service #:port 2222 #:root-login? #t
-                               #:initialize? #t)
+  (services (cons (lsh-service #:port 2222 #:root-login? #t)
                   %base-services)))
 @end lisp
 
@@ -4596,7 +4595,7 @@ Furthermore, @code{(gnu services ssh)} provides the following service.
        [#:allow-empty-passwords? #f] [#:root-login? #f] @
        [#:syslog-output? #t] [#:x11-forwarding? #t] @
        [#:tcp/ip-forwarding? #t] [#:password-authentication? #t] @
-       [#:public-key-authentication? #t] [#:initialize? #f]
+       [#:public-key-authentication? #t] [#:initialize? #t]
 Run the @command{lshd} program from @var{lsh} to listen on port @var{port-number}.
 @var{host-key} must designate a file containing the host key, and readable
 only by root.

gnu/services/ssh.scm

@@ -86,7 +86,7 @@ (define* (lsh-service #:key
                       (tcp/ip-forwarding? #t)
                       (password-authentication? #t)
                       (public-key-authentication? #t)
-                      initialize?)
+                      (initialize? #t))
   "Run the @command{lshd} program from @var{lsh} to listen on port @var{port-number}.
 @var{host-key} must designate a file containing the host key, and readable
 only by root.