Helpers: removed zip_errors() and modified upload limit
Helpers: removed zip_errors() and modified upload limit

Removed zip_errors() because it has a single use case where an error
code is just as useful/useless. Modified upload limit calculation so it
really is Megabytes (bytes * 1000 * 1000) as labelled in various
places, instead of Mebibytes (bytes * 1024 * 1204).

xenocrat/chyrp-lite,xenocrat/chyrp-lite