c-ares: Out of bounds read in ares__read_line()

A vulnerability was found in c-ares where the aresreadline is used to parse local configuration files such as /etc/resolv.conf, /etc/nsswitch.conf, the HOSTALIASES file, and if using a c-ares version prior to 1.22.0, the /etc/hosts file. If the configuration files have an embedded NULL character ...