Backport upstream fix
Description:
It is unclear when new release will happen, so maybe we want to backport e93e13c8b3bec925c56e0c0b675d8000a0f7f754, it removes the backdoor parts:
While the backdoor was inactive (and thus harmless) without inserting a small trigger code into the build system when the source package was created, it's good to remove this anyway
Additional info:
- package version(s): 5.6.1-3