bfg-repo-cleaner jar file is not compatible with OpenJDK's `jexec`

[林博仁(Buo-ren, Lin)]

In Debian systems that install OpenJDK, they seem to be setting up jexec as the binfmt interpreter of launching JAR files (/usr/share/binfmts/jar). However when attempting to run BFG's jar file using jexec it fails with "invalid file (bad magic number): Exec format error" error message.

Refer to the discussion at bfg-repo-cleaner upstream, it seems to be that the `jexec` check is too strict or something:
https://github.com/rtyley/bfg-repo-cleaner/issues/279

Also according to the OpenJDK upstream's JDK6 bug report, `jexec` seems to be never be directly executed by external programs:
https://bugs.java.com/bugdatabase/view_bug.do?bug_id=6401361

## Additional Information ##
OS: KDE neon based on Ubuntu 16.04

[Thorsten Glaser (mirabilos)]

Indeed, the references you found indicate that jexec cannot be used to run normal JARs beginning with “PK”. But these, and nothing else, are what the binfmt is installed for.

https://bugs.openjdk.org/browse/JDK-8176066 indicates jexec is slated for deprecation.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=136993#82 says jarwrapper already catches JAR files with binfmt-misc… and in contrast to jexec it’ll actually work.

I think the proper fix is to remove the binfmt-misc registration from openjdk-8 (at least, but it does work in openjdk-17).