add patch to reload after first install

when installing for the first time we want to reload the network config,
since sometimes the network will not be configured, e.g. when
coming from ifupdown. this would break installing ifupdown2 over
the network (e.g. ssh)

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

debian/patches/pve/0013-postinst-reload-network-config-on-first-install.patch

@@ -0,0 +1,26 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Dominik Csapak <d.csapak@proxmox.com>
+Date: Tue, 6 Jul 2021 13:11:24 +0200
+Subject: [PATCH] postinst: reload network config on first install
+
+Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
+---
+ debian/ifupdown2.postinst | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/debian/ifupdown2.postinst b/debian/ifupdown2.postinst
+index b7de485..eaade7c 100644
+--- a/debian/ifupdown2.postinst
++++ b/debian/ifupdown2.postinst
+@@ -113,6 +113,8 @@ case "$1" in
+         postinst_remove_diverts
+         if [ -f "/tmp/.ifupdown2-first-install" ]; then
+             proxmox_compatibility
++            echo "Reloading network config on first install"
++            ifreload -a
+             rm  /tmp/.ifupdown2-first-install
+         fi
+     ;;
+-- 
+2.30.2
+

debian/patches/series

@@ -10,3 +10,4 @@ pve/0009-allow-vlan-tag-inside-vxlan-tunnel.patch
 pve/0010-postinst-rm-update-network-config-compatibility.patch
 pve/0011-d-rules-drop-now-default-with-systemd.patch
 pve/0012-d-rules-add-dh_installsystemd-override-for-compat-12.patch
+pve/0013-postinst-reload-network-config-on-first-install.patch