Logging: Code review

Logging: Code review

Two bugfixes:

1. (warning) The libcrypto error stack trace was always showing empty.
   This was because of a bad counter.
2. (critical) Normal stack traces were only being printed in the
   standard streams, never on syslog.
   This is probably the reason why we don't have a proper error message
   on #49. It's probably a segmentation fault.

Also a whole bunch of cleanup. The logging module had a bit of a
duplicate code problem.