Download Backup does not add .gz to file name.

When selecting download for a backup, with GZip compression enabled, backup_migrate incorrectly leaves .gz off of the end of the file name.

e.g. mysite-2013-04-22T10-40-28.mysql

It should be: mysite-2013-04-22T10-40-28.mysql.gz.

The file is compressed, just wrongly named. The work around is to manually add .gz to the end of the backup_migrate generated filename, then it works correctly.

But, backup_migrate should generate the correct file name to begin with.

I marked this as critical, because many people will not know to manually add the .gz to the end of the file name when downloading, and when they try to use the downloaded file for a restore, they will get errors saying the file is unusable.

Todd