fix(auth_nocache): fix typo in client template

This fixes an embarrassing typo in #125, causing the `auth_nocache`
setting not to work at all.

Author: dimitry-unified-streaming

openvpn/files/client.jinja

@@ -34,6 +34,6 @@ http-proxy {{ config.http_proxy }}
 auth-user-pass {{ config.auth_user_pass }}
 {%- endif %}
 
-{%- if config.auto_nocache is defined %}
+{%- if config.auth_nocache is defined %}
 auth-nocache
 {%- endif %}