-
-### domains.txt
-
-The file `domains.txt` should have the following format:
-
-```text
-example.com www.example.com
-example.net www.example.net wiki.example.net
-```
-
-This states that there should be two certificates `example.com` and `example.net`,
-with the other domains in the corresponding line being their alternative names.
-
-### $WELLKNOWN / challenge-response
-
-Boulder (acme-server) is looking for challenge responses under your domain in the `.well-known/acme-challenge` directory
-
-This script uses `http-01`-type verification (for now) so you need to have that directory available over normal http (no ssl).
-
-A full URL would look like `http://example.org/.well-known/acme-challenge/c3VjaC1jaGFsbGVuZ2UtbXVjaA-aW52YWxpZC13b3c`.
-
-An example setup to get this to work would be:
-
-nginx.conf:
-```
-...
-location /.well-known/acme-challenge {
- alias /var/www/letsencrypt;
-}
-...
-```
-
-config.sh:
-```bash
-...
-WELLKNOWN="/var/www/letsencrypt"
-...
-```
-
-An alternative to setting the WELLKNOWN variable would be to create a symlink to the default location next to the script (or BASEDIR):
-`ln -s /var/www/letsencrypt .acme-challenges`
-
-### dns-01 challenge
-
-This script also supports the new `dns-01`-type verification. Be aware that at the moment this is not available on the production servers from letsencrypt. Please read https://community.letsencrypt.org/t/dns-challenge-is-in-staging/8322 for the current state of `dns-01` support.
-
-You need a hook script that deploys the challenge to your DNS server!
-
-The hook script (indicated in the config.sh file or the --hook/-k command line argument) gets four arguments: an operation name (clean_challenge, deploy_challenge, or deploy_cert) and some operands for that. For deploy_challenge $2 is the domain name for which the certificate is required, $3 is a "challenge token" (which is not needed for dns-01), and $4 is a token which needs to be inserted in a TXT record for the domain.
-
-Typically, you will need to split the subdomain name in two, the subdomain name and the domain name separately. For example, for "my.example.com", you'll need "my" and "example.com" separately. You then have to prefix "_acme-challenge." before the subdomain name, as in "_acme-challenge.my" and set a TXT record for that on the domain (e.g. "example.com") which has the value supplied in $4
-
-That could be done manually (as most providers don't have a DNS API), by having your hook script echo $1, $2 and $4 and then wait (read -s -r -e < /dev/tty) - give it a little time to get into their DNS system. Usually providers give you a boxes to put "_acme-challenge.my" and the token value in, and a dropdown to choose the record type, TXT.
-
-Or when you do have a DNS API, pass the details accordingly to achieve the same thing.
-
-You can delete the TXT record when called with operation clean_challenge, when $2 is also the domain name.
-
-
-### Elliptic Curve Cryptography (ECC)
-
-This script also supports certificates with Elliptic Curve public keys! Be aware that at the moment this is not available on the production servers from letsencrypt. Please read https://community.letsencrypt.org/t/ecdsa-testing-on-staging/8809/ for the current state of ECC support.