With the changes to limit that print 'Found module …' over and over, we were
hitting the journal field message limit, effectively truncating the info output.
Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1998488.
I read the message and initially thought that there's some bug in time
subtraction. Let's make it clear that the message is about what we'll
do in the future, and not a report on how we waited up until now.
Currently ref count of bpf-program is kept in user space. However, the
kernel already implements its own ref count. Thus the ref count we keep for
bpf-program is redundant.
This PR removes ref count for bpf program as part of a task to simplify
bpf-program and remove redundancies, which will make the switch to
code-compiled BPF programs easier.
Part of #19270
ATTOW llvm-11 got into focal-updates, which conflicts with llvm-11
provided by the apt.llvm.org repositories. Let's use the system
llvm package if available in such cases to avoid that.
Previously, the lifetime was 30 minutes. But it is not necessary to set
to such short time compared with prefix or route prefix lifetime.
Note that the propagated DNS servers and domains are all 'static',
that is, configured in a .network file, and not provided dynamically.
So, it should be safe to use longer lifetime.
