fix some outdated python interpreter shebang

luckily lintian complained, so fix it for two plugins we add in
patches and library module from upstream.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

debian/patches/pve/0002-add-dummy-mtu-bridgevlanport-modules.patch

@@ -38,7 +38,7 @@ index 0000000..ab6a680
 --- /dev/null
 +++ b/ifupdown2/addons/bridgevlanport.py
 @@ -0,0 +1,17 @@
-+#!/usr/bin/python
++#!/usr/bin/env python3
 +#
 +
 +import os
@@ -61,7 +61,7 @@ index 0000000..efdf569
 --- /dev/null
 +++ b/ifupdown2/addons/mtu.py
 @@ -0,0 +1,17 @@
-+#!/usr/bin/python
++#!/usr/bin/env python3
 +#
 +
 +import os

debian/patches/pve/0009-gvgeb-fix-python-interpreter-shebang.patch

@@ -0,0 +1,20 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Thomas Lamprecht <t.lamprecht@proxmox.com>
+Date: Sat, 20 May 2023 14:56:42 +0200
+Subject: [PATCH] gvgeb: fix python interpreter shebang
+
+Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
+---
+ ifupdown2/lib/gvgen.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/ifupdown2/lib/gvgen.py b/ifupdown2/lib/gvgen.py
+index bb1b00d..97ee33a 100644
+--- a/ifupdown2/lib/gvgen.py
++++ b/ifupdown2/lib/gvgen.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/python
++#!/usr/bin/env python3
+ # -*- coding: utf-8 -*-
+ # $Id$
+ """

debian/patches/series

@@ -6,4 +6,5 @@ pve/0005-config-tuning.patch
 pve/0006-openvswitch-ovs-ports-condone-regex-exclude-tap-veth.patch
 pve/0007-allow-vlan-tag-inside-vxlan-tunnel.patch
 pve/0008-lacp-bond-remove-bond-min-links-0-warning.patch
+pve/0009-gvgeb-fix-python-interpreter-shebang.patch
 upstream/0001-add-ipv6-slaac-support-inet6-auto-accept_ra.patch