Remove several very old FAQ entries (#4423)

diff --git a/docs/faq.rst b/docs/faq.rst
index 4ab518e..e28f4c4 100644
--- a/docs/faq.rst
+++ b/docs/faq.rst
@@ -55,11 +55,6 @@
 PyPy. You will need to install your own copy of OpenSSL -- we recommend using
 Homebrew.
 
-Starting ``cryptography`` using ``mod_wsgi`` produces an ``InternalError`` during a call in ``_register_osrandom_engine``
--------------------------------------------------------------------------------------------------------------------------
-
-Upgrade to the latest ``cryptography`` and this issue should be resolved.
-
 ``cryptography`` raised an ``InternalError`` and I'm not sure what to do?
 -------------------------------------------------------------------------
 
@@ -70,11 +65,6 @@
 appear to be at fault, it's possible that this is a bug in ``cryptography``.
 Please file an `issue`_ with instructions on how to reproduce it.
 
-Installing ``cryptography`` fails with ``ImportError: No module named setuptools_ext``
---------------------------------------------------------------------------------------
-
-Your ``cffi`` package is out of date. ``pip install -U cffi`` to update it.
-
 error: ``-Werror=sign-conversion``: No option ``-Wsign-conversion`` during installation
 ---------------------------------------------------------------------------------------
 
@@ -97,7 +87,7 @@
 The OpenSSL project has dropped support for the 0.9.8 and 1.0.0 release series.
 Since they are no longer receiving security patches from upstream,
 ``cryptography`` is also dropping support for them. To fix this issue you
-should upgrade to a newer version of OpenSSL (1.0.1 or later). This may require
+should upgrade to a newer version of OpenSSL (1.0.2 or later). This may require
 you to upgrade to a newer operating system.
 
 .. _`NaCl`: https://nacl.cr.yp.to/