./postconf: warning: ./main.cf: undefined parameter: z
./postconf: warning: ./main.cf: undefined parameter: z
bar = y-value
baz =
config_directory = .
t1 = Postfix 2.11 compatible
x = x-value
y = y-value
./postconf: warning: ./main.cf: unused parameter: foo=$bar$baz
./postconf: warning: ./main.cf: unused parameter: t2=$t1
