Error out on OpenSSL 1.0.0 by default (#3276)

* Error out on OpenSSL 1.0.0 by default

* what the heck
diff --git a/docs/installation.rst b/docs/installation.rst
index 724c63d..e1818d3 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -37,8 +37,8 @@
 * ``OpenSSL 1.1.0``
 
 .. warning::
-    OpenSSL 1.0.0 is no longer supported by the OpenSSL project. Cryptography
-    will drop support for it in the next release.
+    Cryptography 1.7 has dropped support for OpenSSL 1.0.0, see the
+    :doc:`FAQ </faq>` for more details
 
 Building cryptography on Windows
 --------------------------------