Event creation fails: max POST size exceeded

[Maprunner]

This came up as a problem for the Scottish 6-Day, depending on exactly how many runners finished and how many control sthey punched in total. max_post_size seems to be set to 1MB for Siteground (although the FAQ suggests it is 100MB), and cannot be modified. Big results files pushed the POST data just over this.

The short-term solution is to remove some of the unused data fields that were being posted.