bus/policy: make local functions static

These two functions are used only locally in bus/policy.c:
- bus_client_policy_optimize()
- bus_client_policy_append_rule()

Make them static, remove declarations from the header file,
add forward declarations in the C file.

Change-Id: Ideba1fea470bc0d38c04f428b23270fe6176ac95

bus/policy.c

@@ -31,6 +31,10 @@
 #include <dbus/dbus-internals.h>
 #include <dbus/dbus-message-internal.h>
 
+static void bus_client_policy_optimize (BusClientPolicy *policy);
+static dbus_bool_t bus_client_policy_append_rule (BusClientPolicy *policy,
+                                                  BusPolicyRule *rule);
+
 BusPolicyRule*
 bus_policy_rule_new (BusPolicyRuleType type,
                      dbus_bool_t       allow)
@@ -778,7 +782,7 @@ remove_rules_by_type_up_to (BusClientPolicy   *policy,
     }
 }
 
-void
+static void
 bus_client_policy_optimize (BusClientPolicy *policy)
 {
   DBusList *link;
@@ -858,7 +862,7 @@ bus_client_policy_optimize (BusClientPolicy *policy)
                  _dbus_list_get_length (&policy->rules));
 }
 
-dbus_bool_t
+static dbus_bool_t
 bus_client_policy_append_rule (BusClientPolicy *policy,
                                BusPolicyRule   *rule)
 {

bus/policy.h

@@ -170,9 +170,6 @@ dbus_bool_t      bus_client_policy_check_can_receive (BusClientPolicy  *policy,
                                                       dbus_int32_t     *toggles);
 dbus_bool_t      bus_client_policy_check_can_own     (BusClientPolicy  *policy,
                                                       const DBusString *service_name);
-dbus_bool_t      bus_client_policy_append_rule       (BusClientPolicy  *policy,
-                                                      BusPolicyRule    *rule);
-void             bus_client_policy_optimize          (BusClientPolicy  *policy);
 
 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
 dbus_bool_t      bus_policy_check_can_own     (BusPolicy  *policy,