Forward cert variables to AJP on api-cert domain

- Updated template for cert-only API domain. We must include
  subject/issuer and other cert variables in AJP request
  to tomcat, otherwise user is not recognized.

Author: zlamalp

templates/sites-enabled/perun-api-cert.conf.j2

@@ -94,7 +94,7 @@
         ProxySet secret={{ perun_rpc_ajp_secret }}
     </Proxy>
 
-    RewriteRule ^/(.*)/rpc/(.*)$ ajp://{{ perun_rpc_container.container.Config.Hostname }}:8009/perun-rpc/$2 [P,QSA]
+    RewriteRule ^/(.*)/rpc/(.*)$ ajp://{{ perun_rpc_container.container.Config.Hostname }}:8009/perun-rpc/$2 [P,QSA,E=AJP_SSL_CLIENT_VERIFY:%{SSL:SSL_CLIENT_VERIFY},E=AJP_SSL_CLIENT_I_DN:%{SSL:SSL_CLIENT_I_DN},E=AJP_SSL_CLIENT_S_DN:%{SSL:SSL_CLIENT_S_DN},E=AJP_SSL_CLIENT_CERT:%{SSL:SSL_CLIENT_CERT}]
 
     ####################################
     ##     AuthN Methods            ####