Log Message:
Upgrade to 3.21.10 [BETA]

Changes since 3.21.9:
* bugfix: inconsistent use of mutex/atomic operations could cause segfault
  details are too many, for full analysis see blog post at:
  http://blog.gerhards.net/2009/01/rsyslog-data-race-analysis.html
* the string "Do Die" was accidently emited upon exit in non-debug mode
  This has now been corrected. Thanks to varmojfekoj for the patch.
* some legacy options were not correctly processed.
  Thanks to varmojfekoj for the patch.
* doc bugfix: v3-compatiblity document had typo in config directive
  thanks to Andrej for reporting this