GitLab

This part use ACMEDirectory in requests to ACME server.
Next part will remove last remaining CAUrl code and enable dynamic agreement url.

This commit update configuration constraints to use ACMEDirectory instead of CAUrl.
Next part will use effectively this new configuration to do requests to ACME server.

Clean tests and cover more code

Clean up tests code
Add some tests to cover more code

See merge request !4

logassert was added as requirements as the check have to look for log messages

DNS: fix search of dns host IP address configuration give us already an IP address



See merge request !3

tsig: simplifies algorithm list

The algorithm names match now the names used in dnssec-keygen and dnspython tools.

See merge request !2

The algorithm names match now the names used in dnssec-keygen and dnspython tools.

gitlab-ci: add master build badges to README



See merge request !1

This check use the DNS server defined in DNS section (Host setting).

For each host, the script will :
1. push update to the DNS host
2. wait delay configured in seconds with parameter CheckChallengeDelay
3. ask the DNS host for TXT entries corresponding to the challenge
4. check if at least one entry corresponds to the key authorization
    * if there's one, let ask to the acme server to check themselves
    * if there's none:
        * wait 2 seconds and retry from step 3 (retry 10 times)
5. If after 10 retries nothing happend, stop with error

So, we have this behavior:
* if user knows its setup has no bottleneck and won't apply delay before checks,
   he sets CheckChallengeDelay to 0.
* if user knows there's some bottleneck for DNS update, it can set CheckChallengeDelay
   to a specific amount of seconds

In both case, the script will ensure it won't bother the ACME server with useless
operations.

The gitlab project is configured to scan the build logs
to find the code coverage percent with a regular expression.

See the projects' wiki to have more information to configure
Gitlab CI.

This project use gitlab-ci and don't need any more coveralls.

With DNS verification we don't need a FUSE server and we need
dnspython3 package.

The dnspython has merged code for python2 and python3, but the
current release has an error with TSIG key management (due to the
code merge). So we are now stuck with the dnspython3 package.

openssl tests:
we don't manage the OpenSSL code, so these tests are useless.

exsitence domain tests:
commented as dynamic DNS updates can create new domains.

configuration tests:
configuration management has a lot changed, so we'll have to
make new tests.

Remove the code managing FUSE and use configuration files instead.

Finally, ask ACME server to delete account key as it is only temporary files
and we don't save them.

We don't need any more a FUSE server, but we need more
environment variable defined to run tests.

Monkey use these variables to create temporary configuration
files from an example configuration.

The SAN test tries to validate multiple SAN to check the loop code.

configurable

Thanks to @rspeed for PR diafygi/acme-tiny#89

If the script was able to add a DNS record, it must remove it before end of
execution (even in case of errors).