OK, I updated /usr/libexec/nethserver/letsencrypt-certs with:
my $before = defined($tmp) ? $tmp->mtime : 0;
print $before."\n";
my $cmd = "$lebin $opts";
And:
my $after = defined($tmp) ? $tmp->mtime : 0;
print $after."\n";
if ($before != $after) {
Guess what. Both “before” and “after” have the value “0”, hence no updates to the pki properties.
Cheers.