We have implemented this flag in order to avoid unnecessary download traffic. It can only be set by us, in-house, as we generate the control files through the Update compiler.
It means that any file that could not be updated receives this IGNORE flag through the Update compiler.
This ensures that the web loader uses exactly the same control files as the Updater!
Update Logfile Entries:
[UPD] [INFO] The IGNORE flag is set for the file 'antivirus/15.0.36.163/win/en-us/en-us/eula.txt'. The file will therefore not be taken into account.
[UPD] [INFO] The IGNORE flag is set for the file 'antivirus/15.0.36.163/win/en-us/filelist.ini'. The file will therefore not be taken into account.