Add IcingaStatusWriter to features-available.

Fixes #5741
Fix initial check interval.

Refs #5716
Use fewer threads for plugin-based checks.

Fixes #5748
Decrease the maximum number of threads allowed per ThreadPool.

Refs #5748
Call Process callbacks asynchronously.

Refs #5748
Build fix.
Documentation: Fix markdown pipe in table cell.
Fix enable_perfdata attribute in compat features.

Fixes #5693
Documentation: Add Vagrant on Windows, refactor Vagrant section.

Fixes #5569
Build fix.
Fix: Plugin-based checks are broken.

Fixes #5751
Fix the Puppet manifests.

Fixes #5752
Reschedule services before running checks.

Fixes #5754
Remove comment when clearing acknowledgement.

Fixes #5366
Fix Process timeouts.

Fixes #5759
Use more threads for Process I/O.

Refs #5748
Windows build fix.
Output child pid to debug log when forking.

Fixes #5756

Signed-off-by: Gunnar Beutner <gunnar.beutner@netways.de>
Fix host, service sort order in StatusDataWriter.

Fixes #5775
Fix RandomCheckTask result processing.

Fixes #5780