Features:
+* libsystemd-network:
+ - I don't think there should be a client side object for dhcp
+ releases (probably not even a directory in /run for it)
+ - the order between ipv6 and ipv4 dns servers probably matters,
+ hence the current DNS apis won't suffice
+ - sd_network_get_ifindices() sounds redundant, rtnetlink can do that too
+
+* resolved:
+ - IDN (?)
+ - DNSSEC
+ - LLMNR
+ - mDNS/DNS-SD
+ - DNS-SD service registration from socket units
+ - port sd-resolve to direct bus calls
+ - nss module: fallback to glibc dns modules if resolved cannot be contacted
+ - edns0 + dname
+ - cname on PTR (?)
+ - negative caching
+
* Allow multiple ExecStart= for all Type= settings, so that we can cover rescue.service nicely
* the resolv.conf tmpfiles line should be covered by ENABLE_NETWORKD...