Added variable for vim syntax highlighting

zamba.conf

@@ -75,6 +75,9 @@ LXC_TIMEZONE="Europe/Berlin"
 # Define system language on LXC container (locales)
 LXC_LOCALE=de_DE.UTF-8
 
+# Set dark background for vim syntax highlighting (0 or 1)
+LXC_VIM_BG_DARK=1
+
 ############### Zamba-Server-Section ###############
 
 # Defines the REALM for the Active Directory (AD DC, AD member)