Add DNS provider for RU Center

[AntonDzyk]

[ldez]

Hello, in order for a PR adding a DNS provider to be accepted, you have to:

• [ ] add a description to your PR
• [ ] be able to maintain this provider
• [x] have a homogeneous design with the other providers
• [x] add tests (units)

make test

• [x] add tests ("live") https://github.com/go-acme/lego/blob/c938de68f262c057542d44bcb67ef961cefcc60e/providers/dns/cloudflare/cloudflare_test.go#L125-L151

make test

• [x] add a provider descriptor
• [x] generate CLI help, documentation, and readme.

make generate-dns

• [ ] be able to do: (and put the output of this command to a comment in your PR)

rm -rf .lego

./lego -m [email protected] --dns YOUR_PROVIDER_NAME -d *.example.com -d example.com -s https://acme-staging-v02.api.letsencrypt.org/directory run

Note the wildcard domain is important.

• [x] pass the linter (golangci-lint must be installed):

make checks

• [x] do go mod tidy

[ldez]

Your PR was far away from the design of the other implementations, so I rewrite it and add tests on the client.

You can check my previous comment to know what are the next requirements.

[ldez]

ping @AntonDzyk

[ldez]

@AntonDzyk can you provide the missing information? https://github.com/go-acme/lego/pull/1892#issuecomment-1505154811

[ldez]

ping @AntonDzyk

[ldez]

I'm still waiting for feedback @AntonDzyk.

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If there is a user that wants to test this PR, you are welcome.