Update set_mode API docs to use rst instead of epytext.
diff --git a/OpenSSL/ssl/context.c b/OpenSSL/ssl/context.c
index 9a9fd11..aa4976d 100644
--- a/OpenSSL/ssl/context.c
+++ b/OpenSSL/ssl/context.c
@@ -1111,8 +1111,8 @@
static char ssl_Context_set_mode_doc[] = "\n\
Add modes via bitmask. Modes set before are not cleared!\n\
\n\
-@param mode: The mode to add.\n\
-@return: The new mode bitmask.\n\
+:param mode: The mode to add.\n\
+:return: The new mode bitmask.\n\
";
static PyObject *
ssl_Context_set_mode(ssl_ContextObj *self, PyObject *args) {