update TODO

TODO

@@ -183,16 +183,12 @@ Features:
     we always process them before we process client requests
   - DNSSEC
         - add display of private key types (http://tools.ietf.org/html/rfc4034#appendix-A.1.1)?
-  - DNS
-        - search paths
   - mDNS/DNS-SD
         - mDNS RR resolving
         - service registration
         - service/domain/types browsing
         - avahi compat
   - DNS-SD service registration from socket units
-  - edns0
-  - cname on PTR (?)
   - resolved should optionally register additional per-interface LLMNR
     names, so that for the container case we can establish the same name
     (maybe "host") for referencing the server, everywhere.