Bug: stats.lua option &dfrom=nnn&dto=mmm does not work

The following section:

https://github.com/apache/incubator-ponymail/blob/3cf690f6ab23e473542e08c56960fa2117da9e29/site/api/stats.lua#L190-L192

means that the previous section which processes &dfrom=nnn&dto=mmm no longer works; the daterange values will always be overridden

Start with site/api/stats.lua, especially lines 190-192 and the preceding section that processes dfrom and dto. Trace how the daterange values are assigned, then verify that explicitly supplied date options are no longer overridden when the stats API handles a request.

Written by the indexing model from the issue text.