I am reading the IPv6 Textbook from ipv6textbook.com and they mention the L and A flags of the Router Advertisement messages where it states:
"RA messages are quite complex and are defined in detail in RFC 4861. They contain one Prefix Information Option (PIO) for each routeable IPv6 prefix that they can handle. A PIO naturally contains the prefix itself (theoretically of any length; in practice normally 64 bits), some lifetime information, and two flag bits known as L and A. L=1 signifies that the prefix is indeed supported on the link concerned -- this is needed for on-link determination as mentioned in the previous section. A=1 signifies that the prefix may indeed be used for stateless address auto-configuration. A PIO with A=L=0 signifies only that the router can act as the first hop router for the prefix concerned [RFC8028]. For auto-configuration, when a node receives a typical RA/PIO with A=L=1, it configures an address for itself, and also records the fact the the announced prefix is on-link."
I have a hunch that it's ra_flags and ra-slaac and maybe ra_manage in the dhcp section, but I'm not sure.