Xext, os: Remove OS-internal usages within XACE and XSELinux

These extensions were accessing internal OS functions and
structures. Expose the necessary functionality to them and remove
their use of osdep.h

Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

Xext/xace.c

@@ -29,11 +29,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include "gcstruct.h"
 #include "xacestr.h"
 
-#define XSERV_t
-#define TRANS_SERVER
-#include <X11/Xtrans/Xtrans.h>
-#include "../os/osdep.h"
-
 _X_EXPORT CallbackListPtr XaceHooks[XACE_NUM_HOOKS] = { 0 };
 
 /* Special-cased hook functions.  Called by Xserver.
@@ -342,15 +337,11 @@ XaceCensorImage(ClientPtr client,
 int
 XaceGetConnectionNumber(ClientPtr client)
 {
-    XtransConnInfo ci = ((OsCommPtr) client->osPrivate)->trans_conn;
+    return GetClientFd(client);
-
-    return _XSERVTransGetConnectionNumber(ci);
 }
 
 int
 XaceIsLocal(ClientPtr client)
 {
-    XtransConnInfo ci = ((OsCommPtr) client->osPrivate)->trans_conn;
+    return ClientIsLocal(client);
-
-    return _XSERVTransIsLocal(ci);
 }

Xext/xselinux_hooks.c

@@ -41,7 +41,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include "extnsionst.h"
 #include "xacestr.h"
 #include "client.h"
-#include "../os/osdep.h"
 #define _XSELINUX_NEED_FLASK_MAP
 #include "xselinuxint.h"
 

include/os.h

@@ -415,12 +415,19 @@ typedef struct {
 
 extern _X_EXPORT int
 GetLocalClientCreds(ClientPtr, LocalClientCredRec **);
+
 extern _X_EXPORT void
 FreeLocalClientCreds(LocalClientCredRec *);
 
 extern _X_EXPORT int
 ChangeAccessControl(ClientPtr /*client */ , int /*fEnabled */ );
 
+extern _X_EXPORT int
+GetClientFd(ClientPtr);
+
+extern _X_EXPORT Bool
+ClientIsLocal(ClientPtr client);
+
 extern _X_EXPORT int
 GetAccessControl(void);
 

os/access.c

@@ -1574,6 +1574,20 @@ GetAccessControl(void)
     return AccessEnabled;
 }
 
+int
+GetClientFd(ClientPtr client)
+{
+    return ((OsCommPtr) client->osPrivate)->fd;
+}
+
+Bool
+ClientIsLocal(ClientPtr client)
+{
+    XtransConnInfo ci = ((OsCommPtr) client->osPrivate)->trans_conn;
+
+    return _XSERVTransIsLocal(ci);
+}
+
 /*****************************************************************************
  * FamilyServerInterpreted host entry implementation
  *