SHIBUI-2646: fixes for MDQ when not using pac4j and entity ids have a…

… slash in the id

backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/configuration/SpringSecurityConfig.java

@@ -191,7 +191,9 @@ public WebSecurityCustomizer noAuthWebSecurityCustomizer() {
     }
 
     private HttpFirewall defaultFirewall() {
-        return new DefaultHttpFirewall();
+        DefaultHttpFirewall defaultFirewall = new DefaultHttpFirewall();
+        defaultFirewall.setAllowUrlEncodedSlash(true);
+        return defaultFirewall;
     }
 
     class SimpleAuthenticationProvider implements AuthenticationProvider {