List datatype

[lrascao]

I found a need for a .conf datatype parameter that is a list of something (string, integer, etc)

a = v1, v2, v3

I figured we could expand the list of admissible datatypes with a recursive {list, Datatype}
format. Does this make sense? I already tried out the approach in a small branch with the minimal change.

[lrascao]

Early proposal at #22

[michaelklishin]

This idea sounds reasonable. Many projects currently use maps with ignored keys to accomplish this.

[lrascao]

closing via #22