Add fwl, fix pkm & vm_inst, update debian_preseed & provision_linux

.config/fish/functions/fwl.fish

@@ -0,0 +1,54 @@
+function fwl -d 'Function to simplify interacting with firewalld'
+    argparse --ignore-unknown \
+        p/permanent \
+        r/reset \
+        'z/zone=' \
+        'o/policy=' \
+        's/service=' \
+        -- $argv
+
+    if set -q _flag_reset
+        echo 'Resetting fwl ...'
+        _fwl_reset
+        return
+    end
+
+    if set -q _flag_permanent
+        if set -q _fwl_perm
+            set -ge _fwl_perm
+        else
+            set -g _fwl_perm --permanent
+        end
+    end
+
+    if set -q _flag_zone
+        set -g _fwl_mode "--zone=$_flag_z"
+    else if set -q _flag_policy
+        set -g _fwl_mode "--policy=$_flag_o"
+    else if set -q _flag_service
+        set -g _fwl_mode "--service=$_flag_s"
+    end
+
+    echo fwl_mode={$_fwl_perm} $_fwl_mode
+
+    test -z "$argv"; and return
+
+    switch $argv
+        case i info
+            set argv --list-all
+        case a all
+            set argv --list-all-zones
+        case on all-on
+            set argv --get-active-zones
+        case s services
+            set argv --get-services
+    end
+
+    sudo firewall-cmd {$_fwl_perm} {$_fwl_mode} $argv
+end
+
+function _fwl_reset -d 'Reset fwl global variables'
+    set -ge _fwl_mode
+    set -ge _fwl_perm
+    return 0
+end