limesurvey: enable Apache mod_rewrite on update

Containers created before the install fix have mod_rewrite disabled, and
LimeSurvey updates itself through the web interface, so nothing in the
existing update path would ever repair them.

Enable the module from the update script and restart Apache, guarded by
the mods-enabled symlink so an already working container is left alone
and no service is restarted for nothing.

Author: Jonathan Starck

ct/limesurvey.sh

@@ -28,6 +28,15 @@ function update_script() {
     msg_error "No ${APP} Installation Found!"
     exit
   fi
+
+  # mod_rewrite is required by the shipped .htaccess (for upgrades from older versions)
+  if [[ ! -L /etc/apache2/mods-enabled/rewrite.load ]]; then
+    msg_info "Enabling Apache mod_rewrite"
+    $STD a2enmod rewrite
+    systemctl restart apache2
+    msg_ok "Enabled Apache mod_rewrite"
+  fi
+
   setup_mariadb
 
   msg_warn "Application is updated via Web Interface"