Avoid deadlock due to pthreads design.

$OpenBSD: patch-beaker_synchronization_py,v 1.1.1.1 2010/01/10 12:59:22 fgsch Exp $
--- beaker/synchronization.py.orig	Thu Jan  7 22:43:56 2010
+++ beaker/synchronization.py	Thu Jan  7 22:50:23 2010
@@ -20,11 +20,14 @@ try:
     sys.getwindowsversion()
     has_flock = False
 except:
-    try:
-        import fcntl
-        has_flock = True
-    except ImportError:
+    if sys.platform.startswith('openbsd'):
         has_flock = False
+    else:
+        try:
+            import fcntl
+            has_flock = True
+        except ImportError:
+            has_flock = False
 
 from beaker import util
 from beaker.exceptions import LockError