Log Message:
Update to 5.8.7.

Changes since 5.8.6:
- bugfix: instabilities when using RFC5424 header fields
  Thanks to Kaiwang Chen for the patch
- bugfix: imuxsock did truncate part of received message if it did not
  contain a proper date. The truncation occured because we removed that
  part of the messages that was expected to be the date.
  closes: http://bugzilla.adiscon.com/show_bug.cgi?id=295
- bugfix: potential abort after reading invalid X.509 certificate
  closes: http://bugzilla.adiscon.com/show_bug.cgi?id=290
  Thanks to Tomas Heinrich for the patch
- bugfix: stats counter were not properly initialized on creation
- FQDN hostname for multihomed host was not always set to the correct name
  if multiple aliases existed. Thanks to Tomas Heinreich for the patch.