xace: drop site-policy and declare-extension-security hooks, add 2 new hooks

for controlling access to screens and screen savers.

Xext/xace.c

@@ -156,24 +156,18 @@ int XaceHook(int hook, ...)
 	    prv = &rec.status;
 	    break;
 	}
-	case XACE_SITE_POLICY: {
-	    XaceSitePolicyRec rec = {
-		va_arg(ap, char*),
-		va_arg(ap, int),
-		BadValue /* default unrecognized */
+	case XACE_SCREEN_ACCESS:
+	case XACE_SCREENSAVER_ACCESS: {
+	    XaceScreenAccessRec rec = {
+		va_arg(ap, ClientPtr),
+		va_arg(ap, ScreenPtr),
+		va_arg(ap, Mask),
+		Success /* default allow */
 	    };
 	    calldata = &rec;
 	    prv = &rec.status;
 	    break;
 	}
-	case XACE_DECLARE_EXT_SECURE: {
-	    XaceDeclareExtSecureRec rec = {
-		va_arg(ap, ExtensionEntry*),
-		va_arg(ap, Bool)
-	    };
-	    calldata = &rec;
-	    break;
-	}
 	case XACE_AUTH_AVAIL: {
 	    XaceAuthAvailRec rec = {
 		va_arg(ap, ClientPtr),

Xext/xace.h

@@ -51,8 +51,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define XACE_EXT_ACCESS			8
 #define XACE_HOSTLIST_ACCESS		9
 #define XACE_SELECTION_ACCESS		10
-#define XACE_SITE_POLICY		11
-#define XACE_DECLARE_EXT_SECURE		12
+#define XACE_SCREEN_ACCESS		11
+#define XACE_SCREENSAVER_ACCESS		12
 #define XACE_AUTH_AVAIL			13
 #define XACE_KEY_AVAIL			14
 #define XACE_AUDIT_BEGIN		15

Xext/xacestr.h

@@ -101,18 +101,12 @@ typedef struct {
     int status;
 } XaceSelectionAccessRec;
 
-/* XACE_SITE_POLICY */
 typedef struct {
-    char *policyString;
-    int len;
+    ClientPtr client;
+    ScreenPtr screen;
+    Mask access_mode;
     int status;
-} XaceSitePolicyRec;
-
-/* XACE_DECLARE_EXT_SECURE */
-typedef struct {
-    ExtensionEntry *ext;
-    Bool secure;
-} XaceDeclareExtSecureRec;
+} XaceScreenAccessRec;
 
 /* XACE_AUTH_AVAIL */
 typedef struct {