w32: Also change the directory on daemon startup.

* agent/gpg-agent.c (main): Always to the chdir.
* dirmngr/dirmngr.c (main): Ditto.
* scd/scdaemon.c (main): Ditto.
--

Note that only dirmngr did not call the chdir with --no-detach.  thus
we kept it this way.

Tested gpg-agent by checking the properties shown by procexp.

Gnupg-bug-id: 2670
Signed-off-by: Werner Koch <wk@gnupg.org>

scd/scdaemon.c

@@ -908,6 +908,8 @@ main (int argc, char **argv )
         sigaction (SIGPIPE, &sa, NULL);
       }
 
+#endif /*!HAVE_W32_SYSTEM*/
+
       if (gnupg_chdir (gnupg_daemon_rootdir ()))
         {
           log_error ("chdir to '%s' failed: %s\n",
@@ -915,8 +917,6 @@ main (int argc, char **argv )
           exit (1);
         }
 
-#endif /*!HAVE_W32_SYSTEM*/
-
       handle_connections (fd);
 
       close (fd);