Fix uploading of database files from clients using the file1 form tag
Fix uploading of database files from clients using the file1 form tag

When the file1 attribute is set instead of the file attribute (which
apparently happens for some clients), the UploadResponse function used
by the db4s backend would exit instead of actually handling the upload.

This fixes issue sqlitebrowser/dio#5.

sqlitebrowser/dbhub.io,sqlitebrowser/dbhub.io