[Bugfix] When multiple host is specified, one port/protocol can't be specified #105
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Fixed a bug introduced with #104.
As per docs, the user can specify multiple PIHole addresses, while keeping the other env variables with only one value. This behaviour was bugged, forcing the user to specify multiple ports and protocols even if they are the same for all PIHole instances
This PR will fix #106 and add some tests for these use cases.