spec: AF_UNIX now available on Windows as well

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

doc/dbus-specification.xml

@@ -3634,10 +3634,8 @@
       </para>
 
       <para>
-        Unix domain sockets are not available on Windows.
-        On all other platforms, they are the recommended transport for
-        D-Bus, either used alone or in conjunction with
-        <link linkend="transports-systemd">systemd</link> or
+        They are the recommended transport for D-Bus, either used alone or in
+        conjunction with <link linkend="transports-systemd">systemd</link> or
         <link linkend="transports-launchd">launchd</link> addresses.
       </para>
       <para>
@@ -3938,14 +3936,6 @@
         information on situations where these transports have been used,
         and alternatives to these transports.
       </para>
-      <para>
-        Implementations of D-Bus on Windows operating systems normally
-        use a nonce-tcp transport via the local loopback interface.
-        This is because the
-        <link linkend="transports-unix-domain-sockets">unix</link>
-        transport, which would otherwise be recommended, is not
-        available on these operating systems.
-      </para>
 
       <para>
         On start, the server generates a random 16 byte nonce and writes it