The lack of txtRecord

[shekhei]

txtRecord is kinda useful when there are other sort of metadata that you would like to publish, but it is not available in this implementation. Are there any plans for this?

[asafyish]

txtRecord is only available for mdns discovery, this implementation is of udp discovery.
There is an interesting read at http://hintjens.com/blog:32 on different implementations of discovery (by Pieter Hintjens which is a networking guru).

If you still need txtRecord, have a look on https://github.com/mafintosh/multicast-dns - mdns discovery.