This will allow for the following fixes and improvements:
* A very small number of users have names ending with backslashes, which messed with the import process and caused some data corruption (limited to individual lines).
** It seems like this can be fixed by feeding `mysqlimport` the option `--fields-escaped-by=""` instead of the default `--fields-escaped-by="\\"`. This makes very little sense, because a backslash is the escape character in the source file (e.g. the username `\wowzeryest\` appears in the file as `\\wowzeryest\\`), but what can you do?
* Seems to undercount mobile edits compared to using multiquery to count change tags?
* Massively undercounts commons activity because file namespaces are not the main namespace
** Create a table of content namespaces and join on it?
* Null usernames were imported as the string `"NULL"` and null datetimes as the datetime `0000-00-00 00:00:00`.
* Additional fields?