Join add cds cleanup

[romu42]

136 triggered this PR, I went through the code. It was fine, but I updated the Variables to make it easier to follow the logic.

[romu42]

• Changed "verifys" to "verifies
• Opened a issue #199 to refactor the ZoneType, it changes a lot of files so I feel more comfortable having that in a separate PR
• Not sure by what you mean by : 'cdnskeyFrom...' --> 'cdnskeysFrom...' ?
• In regards to k,_ := range..., there is s difference between if you have a blank identifier as the last iteration variable or not. All other uses in the file are _ , VAR := range ITERABLE

from the go 1.17 spec If the last iteration variable is the blank identifier, the range clause is equivalent to the same clause without that identifier.

That being said, I put it back for readability.

[romu42]

closes #136

[romu42]

The change of the variable names is to make it easier to follow the code, I find it easier now at least. An issue was opened stating that the code was not robust. When reading the code I found it difficult to follow and decided to clean up the variable naming a bit. If you don't find this helpful or important I am interested to hear any alternatives to a better way to make such changes with out you having to do a review.