core.certmanager: Support 'use_dane' setting to enable DANE support
Removes the need to enable DANE with two separate settings.
Previously you had to also set `ssl = { dane = true }` to activate DANE
support in LuaSec and OpenSSL.
The Prosody project is open to contributions (see HACKERS file), but is
maintained daily by:
- Matthew Wild (mail: matthew [at] prosody.im)
- Waqas Hussain (mail: waqas [at] prosody.im)
- Kim Alvefur (mail: zash [at] prosody.im)
You can reach us collectively by email: developers [at] prosody.im
or in realtime in the Prosody chatroom: prosody@conference.prosody.im