fix apache config syntax

shibauth/etc-httpd/conf.d/shib.conf

-ServerName emg.pdas.prism.eox.at
 LoadModule mod_shib /usr/lib64/shibboleth/mod_shib_24.so
 ShibCompatValidUser Off
 UseCanonicalName On
+DocumentRoot "/var/www/html"
 <Location />
   SetHandler shib
 </Location>

shibauth/etc-httpd/conf.d/sp.conf

 <VirtualHost *:80>
-    ServerName PassEnv APACHE_SERVERNAME
-    UseCanonicalName On
-
-    DocumentRoot "/var/www/html"
+    PassEnv APACHE_SERVERNAME
+    ServerName "${APACHE_SERVERNAME}"
     <Location /secure>
       AuthType shibboleth
       ShibRequestSetting requireSession 1
-      ShibAccessControl /etc/shibboleth/pass-ac.xml
+      Require shib-plugin /etc/shibboleth/pass-ac.xml
       RequestHeader set Referer "%{X-Forwarded-Uri}e"
       Header set Referer "%{X-Forwarded-Uri}e"
     </Location>