pihole: Use API url with Token

[elulcao]

Use API url with Token, this change is based on the recommendation posted here. Pihole must be password protected and 3rd party apps must use a token.

Not using the token will return an empty response object that triggers the error failed to retrieve status: check provided api URL and token json: cannot unmarshal array into Go value of type pihole.Status

Using the correct token will allow the response to include the correct status Status ENABLED

eg:

curl http://pi.hole/admin/api.php?status&auth=${TOKEN}
{"status":"enabled"}

Verification:

• make test
• make && ./bin/wtfutil

[senorprogrammer]

Thanks!