Fixed typo in ssl_version doc, TLSv2 -> TLSv1_2 (TLS 1.2). (#1959)

* Fixed typo in ssl_version doc, TLSv2 -> TLSv1_2 (TLS 1.2).

Signed-off-by: Brett Randall <[email protected]>

* revert chdir change

Author: javabrett

docs/source/settings.rst

@@ -436,11 +436,29 @@ ssl_version
 * ``--ssl-version``
 * ``_SSLMethod.PROTOCOL_TLS``
 
-SSL version to use (see stdlib ssl module's)
+SSL version to use.
+
+============= ============
+--ssl-version Description
+============= ============
+SSLv3         SSLv3 is not-secure and is strongly discouraged.
+SSLv23        Alias for TLS. Deprecated in Python 3.6, use TLS.
+TLS           Negotiate highest possible version between client/server.
+              Can yield SSL. (Python 3.6+)
+TLSv1         TLS 1.0
+TLSv1_1       TLS 1.1 (Python 3.4+)
+TLSv1_2       TLS 1.2 (Python 3.4+)
+TLS_SERVER    Auto-negotiate the highest protocol version like TLS,
+              but only support server-side SSLSocket connections.
+              (Python 3.6+)
+============= ============
 
 .. versionchanged:: 19.7
    The default value has been changed from ``ssl.PROTOCOL_TLSv1`` to
    ``ssl.PROTOCOL_SSLv23``.
+.. versionchanged:: 20.0
+   This setting now accepts string names based on ``ssl.PROTOCOL_``
+   constants.
 
 .. _cert-reqs:
 

gunicorn/config.py

@@ -1900,10 +1900,11 @@ class SSLVersion(Setting):
                   Can yield SSL. (Python 3.6+)
     TLSv1         TLS 1.0
     TLSv1_1       TLS 1.1 (Python 3.4+)
-    TLSv2         TLS 1.2 (Python 3.4+)
+    TLSv1_2       TLS 1.2 (Python 3.4+)
     TLS_SERVER    Auto-negotiate the highest protocol version like TLS,
                   but only support server-side SSLSocket connections.
                   (Python 3.6+)
+    ============= ============
 
     .. versionchanged:: 19.7
        The default value has been changed from ``ssl.PROTOCOL_TLSv1`` to