remove boxed from readme

README.rst

@@ -15,8 +15,6 @@ test execution modes:
   those for a combined test run.  This allows to speed up
   development or to use special resources of `remote machines`_.
 
-* ``--boxed``: (not available on Windows) run each test in a boxed_
-  subprocess to survive ``SEGFAULTS`` or otherwise dying processes
 
 * ``--looponfail``: run your tests repeatedly in a subprocess.  After each run
   py.test waits until a file in your project changes and then re-runs
@@ -217,7 +215,7 @@ These directory specifications are relative to the directory
 where the configuration file was found.
 
 .. _`pytest-xdist`: http://pypi.python.org/pypi/pytest-xdist
-.. _`pytest-xdist repository`: http://bitbucket.org/pytest-dev/pytest-xdist
+.. _`pytest-xdist repository`: https://github.com/pytest-dev/pytest-xdist
 .. _`pytest`: http://pytest.org
 
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