Use strings instead of dns_c_category_t. Added token_to_keyword().
Use strings instead of dns_c_category_t.
Added token_to_keyword().

each/bind9-collab,pecharmin/bind9,each/bind9-collab,each/bind9-collab,pecharmin/bind9,pecharmin/bind9,each/bind9-collab,pecharmin/bind9,pecharmin/bind9,pecharmin/bind9,each/bind9-collab,each/bind9-collab