[SOGo, Config, Update] Add SOGO_EXPIRE_SESSION to define default session timeout

update.sh

@@ -163,6 +163,7 @@ CONFIG_ARRAY=(
   "SKIP_SOLR"
   "ALLOW_ADMIN_EMAIL_LOGIN"
   "SKIP_HTTP_VERIFICATION"
+  "SOGO_EXPIRE_SESSION"
 )
 
 sed -i '$a\' mailcow.conf
@@ -281,6 +282,12 @@ for option in ${CONFIG_ARRAY[@]}; do
       echo '# Notify about banned IP. Includes whois lookup.' >> mailcow.conf
       echo "WATCHDOG_NOTIFY_BAN=y" >> mailcow.conf
   fi
+  elif [[ ${option} == "SOGO_EXPIRE_SESSION" ]]; then
+    if ! grep -q ${option} mailcow.conf; then
+      echo "Adding new option \"${option}\" to mailcow.conf"
+      echo '# SOGo session timeout in minutes' >> mailcow.conf
+      echo "SOGO_EXPIRE_SESSION=480" >> mailcow.conf
+  fi
   elif ! grep -q ${option} mailcow.conf; then
     echo "Adding new option \"${option}\" to mailcow.conf"
     echo "${option}=n" >> mailcow.conf