. /usr/lib/network/header-zone
-HOOK_SETTINGS="HOOK ACCESS_CONCENTRATOR AUTH USERNAME PASSWORD"
-HOOK_SETTINGS="${HOOK_SETTINGS} SERVICE_NAME MTU IPV6 PREFIX_DELEGATION"
+HOOK_SETTINGS=(
+ "ACCESS_CONCENTRATOR"
+ "AUTH"
+ "USERNAME"
+ "PASSWORD"
+ "SERVICE_NAME"
+ "MTU"
+ "IPV6"
+ "PREFIX_DELEGATION"
+)
# This hook can work with all authentication methods supported by pppd.
PPPOE_SUPPORTED_AUTH_METHODS="${PPP_SUPPORTED_AUTH_METHODS}"