Related to 98b9e2cd84

project doesn't exist on github anymore

As mentioned in the changelog, this is a breaking change.

These previously denoted optional DNS records but now optional records are a separate table so they are unnecessary.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/683

Added note about cloudflare, related to #821

Adding a comment with regard to DNS propagation

Fixes #586 (Github Issue)

With most people on Synapse v0.99+ and Synapse v1.0 now available,
we should no longer try to be backward compatible with Synapse 0.34,
because this just complicates the instructions for no good reason.

Hopefully, we no longer lead people to believe that DNS SRV
records are going away forever and for all use-cases.

Fixes #156 (Github Issue)