Secure proxying of z-push auto-discover.

snippets/activesync.conf

 location /AutoDiscover/ {
     proxy_pass          https://zpush.shore.co.il$request_uri;
     include             snippets/proxy-headers.conf;
+    include             snippets/proxy-ssl.conf;
 }
 
 location /Autodiscover/ {
     proxy_pass          https://zpush.shore.co.il$request_uri;
     include             snippets/proxy-headers.conf;
+    include             snippets/proxy-ssl.conf;
 }
 
 location /autodiscover/ {
     proxy_pass          https://zpush.shore.co.il$request_uri;
     include             snippets/proxy-headers.conf;
+    include             snippets/proxy-ssl.conf;
 }
 
 location /Microsoft-Server-ActiveSync {
     proxy_pass          https://zpush.shore.co.il$request_uri;
     include             snippets/proxy-headers.conf;
+    include             snippets/proxy-ssl.conf;
 }