loggerd enhancements

[juruen@…]

3 things that loggerd needs to do well:

• It needs to initialize eBox log, because some parts of the code can call EBox::{debug,info...} methods. This could be the origin of permission issues in /var/log/ebox/ebox.log
• It needs to log the result of eval. Actually, we should use try/otherwise and log with otherwise. It is probably that we are missing an error in that eval.
• We need to deal with the file descriptor in our select more carefully. That code has an obvious race condition. What happens if were waiting on a select syscall, on a fd that belongs to a file that is removed and recreated by logrotate?

[juruen@…]

And of course a lot of testing.

[jacalvo@…]

Only second and third points needed now.

[jacalvo@…]

We can try run loggerd on some files and then delete or modify one of them to see what happens.

[jacalvo@…]

(In [15413]) NN: merged loggerd improvements branch (closes #1547)