We still do lowering of the param strings in some internal use of this, but the exported `GetParam` method is changed to a more sensible default.
This was used for the `disqus_title` etc. in the internal Disqus template, which was obviously not right.
If you really want to lowercase your params, do it with `.GetParam "myparam" | lower` or similar.
Fixes#4187
Note that this looks like overkill for just the logger, and that is correct,
but this will make sense once we start with the template handling etc.
Updates #2701
