gpgconf,w32: Print a warning for a suspicious homedir.

* tools/gpgconf.c (list_dirs): Check whether the homedir has been
taken from the registry.
--

Signed-off-by: Werner Koch <wk@gnupg.org>

common/homedir.c

@@ -305,6 +305,9 @@ default_homedir (void)
             {
               char *tmp, *p;
 
+              /* This is deprecated; gpgconf --list-dirs prints a
+               * warning if the homedir has been taken from the
+               * registry.  */
               tmp = read_w32_registry_string (NULL,
                                               GNUPG_REGISTRY_DIR,
                                               "HomeDir");