also propagate PYTHONPATH env var

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/parkinglot@691 e5f2f494-b856-4b98-b285-d166d9295462

src/bin/bind10/bind10.py.in

@@ -71,6 +71,8 @@ class ProcessInfo:
             spawn_env['B10_FROM_SOURCE'] = os.environ['B10_FROM_SOURCE']
         if 'PYTHON_EXEC' in os.environ:
             spawn_env['PYTHON_EXEC'] = os.environ['PYTHON_EXEC']
+        if 'PYTHONPATH' in os.environ:
+            spawn_env['PYTHONPATH'] = os.environ['PYTHONPATH']
         self.process = subprocess.Popen(self.args,
                                         stdin=subprocess.PIPE,
                                         stdout=spawn_stdout,