ui: deprecate "password" option for SPICE server

With the new "password-secret" option, there is no reason to use the old
inecure "password" option with -spice, so it can be deprecated.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210311114343.439820-4-berrange@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
diff --git a/ui/spice-core.c b/ui/spice-core.c
index b9d8ace..272d19b 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -686,6 +686,8 @@
     } else {
         str = qemu_opt_get(opts, "password");
         if (str) {
+            warn_report("'password' option is deprecated and insecure, "
+                        "use 'password-secret' instead");
             password = g_strdup(str);
         }
     }