Drop NetworkManager default config (#1813)

* Drop default NetworkManager configuration

NetworkManager will automatically connect using the global defaults.
Also Supervisor today will create a profiles once the user configures
the network explicitly.

* Create system-connection directory

buildroot-external/rootfs-overlay/etc/NetworkManager/system-connections/default

@@ -1,13 +0,0 @@
-[connection]
-id=Home Assistant OS default
-uuid=f62bf7c2-e565-49ff-bbfc-a4cf791e6add
-type=802-3-ethernet
-llmnr=2
-mdns=2
-
-[ipv4]
-method=auto
-
-[ipv6]
-addr-gen-mode=stable-privacy
-method=auto

buildroot-external/rootfs-overlay/usr/libexec/hassos-overlay

@@ -3,11 +3,7 @@
 mkdir -p /mnt/overlay/etc/
 
 # Network
-if [ ! -d /mnt/overlay/etc/NetworkManager/system-connections ]; then
-    mkdir -p /mnt/overlay/etc/NetworkManager/system-connections
-    cp -fp /etc/NetworkManager/system-connections/* /mnt/overlay/etc/NetworkManager/system-connections/
-    chmod 600 /mnt/overlay/etc/NetworkManager/system-connections/*
-fi
+mkdir -p /mnt/overlay/etc/NetworkManager/system-connections
 
 if [ ! -f /mnt/overlay/etc/hostname ]; then
     cp -fp /etc/hostname /mnt/overlay/etc/hostname

buildroot-external/scripts/rootfs-layer.sh

@@ -19,9 +19,6 @@ function fix_rootfs() {
     # systemd-update-done.service relies on writeable /var and /etc
     rm -f "${TARGET_DIR}/usr/lib/systemd/system/sysinit.target.wants/systemd-update-done.service"
 
-    # Fix: permission for system connection files
-    chmod 600 "${TARGET_DIR}/etc/NetworkManager/system-connections"/*
-
     # Fix: tempfs with /srv
     sed -i "/srv/d" "${TARGET_DIR}/usr/lib/tmpfiles.d/home.conf"