3561039 sd-dhcp6-client: allow NULL option value when length is zero

1 file Authored by Yu Watanabe 2 years ago, Committed by zbyszek 2 years ago,
    sd-dhcp6-client: allow NULL option value when length is zero
    
    (cherry picked from commit d81b5a191e6f06fe51befe7c7fb20cff4ff4f762)