am cc451785: Fix incorrectly sized buffer.

        // Construct "SERVERS=<comma-separated string of DNS addresses>".

        static const char kServerTag[] = "SERVERS=";

        static const int kTagLength = strlen(kServerTag);

        static const size_t kTagLength = strlen(kServerTag);

        // Reserve sufficient space for an IPv6 link-local address: all but the

        // last address are followed by ','; the last is followed by '\0'.

        static const int kMaxSingleAddressLength =

        static const size_t kMaxSingleAddressLength =

                INET6_ADDRSTRLEN + strlen("%") + IFNAMSIZ + strlen(",");

        const int bufsize = kTagLength + numaddrs * (INET6_ADDRSTRLEN + 1);

        const size_t bufsize = kTagLength + numaddrs * kMaxSingleAddressLength;

        char *buf = (char *) malloc(bufsize);

        if (!buf) {

            SLOGE("RDNSS option: out of memory\n");

            return false;

        }

        strcpy(buf, kServerTag);

        int pos = kTagLength;

        size_t pos = kTagLength;

        struct in6_addr *addrs = (struct in6_addr *) (rndss_opt + 1);

        for (int i = 0; i < numaddrs; i++) {