Fixes soft fail logic.

[GilbN]

• Improves readbilty of arm soft fail logic. More pythonic.
  • This will fix test fail if a tag in -e TAGS doesn't have an arch prefix. (Non multiarch images) https://gilbnlsio.s3.eu-north-1.amazonaws.com/linuxserver/lidarr/1.1.1.2664-ls168/index.html
• Fixes href on image if its 404.
• Adds naming of threads (if multiarch) for easier debugging.
  • https://gilbnlsio.s3.eu-north-1.amazonaws.com/linuxserver/lidarr/threadnames-test/ci.log

Also. Please add the hacktoberfest tag to the repo before merging. I want that t-shirt 😁