Add DNS provider for Efficient IP

[ldez]

• have a homogeneous design with the other providers
• pass the linter
• do go mod tidy
• add tests (units)
• add tests ("live")
• add a provider descriptor
• generate CLI help, documentation, and readme.
• be able to do: (and put the output of this command to a comment)

$ EFFICIENTIP_USERNAME="user" \
EFFICIENTIP_PASSWORD="secret" \
EFFICIENTIP_HOSTNAME="ipam.example.com" \
EFFICIENTIP_DNS_NAME="dns.smart" \
./dist/lego -m [email protected] --dns efficientip -d *.lego.example.com -d lego.example.com --dns.resolvers="1.1.1.1" -s https://acme-staging-v02.api.letsencrypt.org/directory run
2023/06/27 19:00:23 No key found for account [email protected]. Generating a P256 key.
2023/06/27 19:00:23 Saved key to /home/ldez/sources/go/src/github.com/go-acme/lego/.lego/accounts/acme-staging-v02.api.letsencrypt.org/[email protected]/keys/[email protected]
2023/06/27 19:00:23 Please review the TOS at https://letsencrypt.org/documents/LE-SA-v1.3-September-21-2022.pdf
Do you accept the TOS? Y/n
y
2023/06/27 19:00:26 [INFO] acme: Registering account for [email protected]
!!!! HEADS UP !!!!

Your account credentials have been saved in your Let's Encrypt
configuration directory at "./.lego/accounts".

You should make a secure backup of this folder now. This
configuration directory will also contain certificates and
private keys obtained from Let's Encrypt so making regular
backups of this folder is ideal.
2023/06/27 19:00:26 [INFO] [*.lego.example.com, lego.example.com] acme: Obtaining bundled SAN certificate
2023/06/27 19:00:27 [INFO] [*.lego.example.com] AuthURL: https://acme-staging-v02.api.letsencrypt.org/acme/authz-v3/7069071614
2023/06/27 19:00:27 [INFO] [lego.example.com] AuthURL: https://acme-staging-v02.api.letsencrypt.org/acme/authz-v3/7069071624
2023/06/27 19:00:27 [INFO] [*.lego.example.com] acme: use dns-01 solver
2023/06/27 19:00:27 [INFO] [lego.example.com] acme: Could not find solver for: tls-alpn-01
2023/06/27 19:00:27 [INFO] [lego.example.com] acme: Could not find solver for: http-01
2023/06/27 19:00:27 [INFO] [lego.example.com] acme: use dns-01 solver
2023/06/27 19:00:27 [INFO] [*.lego.example.com] acme: Preparing to solve DNS-01
2023/06/27 19:00:27 [INFO] [lego.example.com] acme: Preparing to solve DNS-01
2023/06/27 19:00:27 [INFO] [*.lego.example.com] acme: Trying to solve DNS-01
2023/06/27 19:00:27 [INFO] [*.lego.example.com] acme: Checking DNS record propagation using [1.1.1.1:53]
2023/06/27 19:00:29 [INFO] Wait for propagation [timeout: 5m0s, interval: 2s]
2023/06/27 19:00:29 [INFO] [*.lego.example.com] acme: Waiting for DNS record propagation.
2023/06/27 19:00:31 [INFO] [*.lego.example.com] acme: Waiting for DNS record propagation.
2023/06/27 19:00:33 [INFO] [*.lego.example.com] acme: Waiting for DNS record propagation.
2023/06/27 19:00:42 [INFO] [*.lego.example.com] The server validated our request
2023/06/27 19:00:42 [INFO] [lego.example.com] acme: Trying to solve DNS-01
2023/06/27 19:00:42 [INFO] [lego.example.com] acme: Checking DNS record propagation using [1.1.1.1:53]
2023/06/27 19:00:44 [INFO] Wait for propagation [timeout: 5m0s, interval: 2s]
2023/06/27 19:00:47 [INFO] [lego.example.com] The server validated our request
2023/06/27 19:00:47 [INFO] [*.lego.example.com] acme: Cleaning DNS-01 challenge
2023/06/27 19:00:47 [INFO] [lego.example.com] acme: Cleaning DNS-01 challenge
2023/06/27 19:00:47 [INFO] [*.lego.example.com, lego.example.com] acme: Validations succeeded; requesting certificates
2023/06/27 19:00:48 [INFO] Wait for certificate [timeout: 30s, interval: 500ms]
2023/06/27 19:00:49 [INFO] [*.lego.example.com] Server responded with a certificate.

Note the wildcard domain is important.

Closes #1921

[dmke]

LGTM