caddy-frontend: Fix incorrect ssl_ca_crt configuration

In "caddy-frontend: Improve generated files" ssl_ca_crt was mistakenly used
for client authentication, which is in reality not supported nor needed.

It came from misunderstanding of apache configuration.

software/caddy-frontend/buildout.hash.cfg

@@ -62,7 +62,7 @@ md5sum = f20d6c3d2d94fb685f8d26dfca1e822b
 
 [template-default-slave-virtualhost]
 filename = templates/default-virtualhost.conf.in
-md5sum = 669a93b7e21b99066a84494fec47906b
+md5sum = 73bc8abae6aadc3ce55662c3d821b363
 
 [template-cached-slave-virtualhost]
 filename = templates/cached-virtualhost.conf.in

software/caddy-frontend/templates/default-virtualhost.conf.in

@@ -34,10 +34,6 @@
     status 501 /
 {%- endif %} {#- if ssl_proxy_verify and 'ssl_proxy_ca_crt' in slave_parameter #}
   tls {{ slave_parameter.get('path_to_ssl_crt', slave_parameter.get('login_certificate')) }} {{ slave_parameter.get('path_to_ssl_key', slave_parameter.get('login_key')) }} {
-{%- if slave_parameter.get('path_to_ssl_ca_crt') %}
-    # Configuration of accepted clients
-    clients {{ slave_parameter.get('path_to_ssl_ca_crt') }}
-{%- endif %} {#- if slave_parameter.get('path_to_ssl_ca_crt') #}
 {%- if enable_h2 %}
     # Allow HTTP2
     alpn h2 http/1.1