fix issue #6 First booting with a connected ethernet cable makes wicd…

… daemon start with an empty wireless interface

etc/nextcloudpi-config.d/nc-wifi.sh

@@ -26,6 +26,16 @@ install()
 
 configure()
 {
+  # Installation in QEMU (without a wireless interface) produces 
+  # wicd installation to generate 'wireless_interface = None'.
+  # It does not hurt to restart it to wlan0 for RPi3 & zero w
+  sed -i 's|^wireless_interface = None|wireless_interface = wlan0|' /etc/wicd/manager-settings.conf
+
+  # First booting with a connected ethernet cable produces
+  # wicd daemon to generate 'wireless_interface = '. (issue #6)
+  # It does not hurt to restart it to wlan0 for RPi3 & zero w
+  sed -i 's|^wireless_interface = $|wireless_interface = wlan0|'    /etc/wicd/manager-settings.conf
+
   systemctl stop    dhcpcd
   systemctl disable dhcpcd
   systemctl enable  wicd 
@@ -42,11 +52,6 @@ configure()
 6) C to connect" \
   20 90
 
-  # Installation in QEMU (without a wireless interface) produces 
-  # wicd installation to generate 'wireless_interface = None'.
-  # It does not hurt to restart it to wlan0 for RPi3 & zero w
-  sed -i 's|^wireless_interface = None|wireless_interface = wlan0|' /etc/wicd/manager-settings.conf
-
   wicd-curses
 }