Log Message:
Updated to libprelude 0.9.8. Changes:
- Improve idmef-path error reporting.
- Rework configure script so that it use --with[out] in
  place of --(en|dis)able where we deal with external dependencies.
- Rework configure script so that --with[out] work as expected (enabling and
  disabling the feature, explicit error if "with" feature is explicitly
  specified but the feature it is unavailable, etc).
- Rework SNMPService class for IDMEF draft 16 compliance.
- Make sure we set alert CreateTime if the caller did not do it for us.
- Fix handling of \r\n terminated line.
- Ignore character that are part of the option value when comparing
  option specified using --option=value. Fix handling of parent option.