Kernel switching module: complete refactoring and hardening (#308)

* Kernel switching module: hardening
* Add support for headers manipulation and adjust ZFS
* Apply several fixes to ZFS
* Move kernel related features under "Manage kernel options"
Perhaps one day this subfolder is done better as managing is still slow, but at least no affect whole system folder as before.

* Fallback to branch in case this info is lost - perhaps move this to global function.
* Ajust System submenu into new categories

tests/SY202.conf

@@ -0,0 +1 @@
+ENABLED=true

tests/SY203.conf

@@ -0,0 +1 @@
+ENABLED=true

tests/SY206.conf

@@ -0,0 +1 @@
+ENABLED=true

tests/SY207.conf

@@ -0,0 +1 @@
+ENABLED=true

tools/modules/functions/set_runtime_variables.sh

@@ -60,6 +60,9 @@ function set_runtime_variables() {
 	BACKTITLE="Contribute: https://github.com/armbian/configng"
 	TITLE="Armbian configuration utility"
 	[[ -z "${DEFAULT_ADAPTER// /}" ]] && DEFAULT_ADAPTER="lo"
+	# zfs subsystem - determine if our kernel is not too recent
+	ZFS_DKMS_VERSION=$(LC_ALL=C apt-cache policy zfs-dkms | grep Candidate | xargs | cut -d" " -f2 | cut -c-5)
+	ZFS_KERNEL_MAX=$(wget -qO- https://github.com/openzfs/zfs/raw/refs/tags/zfs-${ZFS_DKMS_VERSION}/META | grep Maximum | cut -d" " -f2)
 
 	# detect desktop
 	check_desktop

tools/modules/runtime/config.runtime.sh

@@ -94,6 +94,8 @@ fi
 #plex_media_port="$(lsof -i -P -n | grep TCP | grep LISTEN | grep 'plex' | awk -F: '{print $2}' | awk '{print $1}' | head -n 1)"
 #update_sub_submenu_data "Software" "Media" "SW22" "https://localhost:$plex_media_port"
 
+update_sub_submenu_data "System" "Storage" "SY220" "$(module_zfs zfs_version)"
+update_sub_submenu_data "System" "Storage" "SY221" "$(module_zfs zfs_installed_version)"
 update_sub_submenu_data "Software" "Database" "DAT002" "Server: $LOCALIPADD"
 update_sub_submenu_data "Software" "Database" "DAT006" "http://$LOCALIPADD:${module_options["module_phpmyadmin,port"]}"
 update_sub_submenu_data "Software" "Media" "MED006" "http://$LOCALIPADD:${module_options["module_stirling,port"]}"