Update documentation.

Refs #5870
Replace $plugindir$ macro with a constant.

Fixes #5877
Update documentation.

Refs #5877
Update What's new for 0.0.9.

Fixes #5890
Release 0.0.9.
spec: Fix missing file.
Build fix for FreeBSD.
Documentation: Fix anchor.
Implement additional arguments for log().

Fixes #5902
Support new-lines in addition to commas to separate commands.

Fixes #5901
Fix Vagrant config.

Refs #5870
Fix column information for config errors.

Refs #5901
Documentation: Fix 1.x 2.x differences for comma termination.

Refs #5901
Fix Debian packages not shipping schema/upgrade.

Fixes #5915
Graphite/PerfdataWriter: Add host perfdata.

Fixes #5908
Remove TODO comment.

Refs #5908
CompatUtility: Fix host 2d_coords.

Fixes #5917
Remove support for external scripting languages.

Fixes #5920
Allow anonymous functions to be garbage-collected.

Fixes #5921
Allow functions to return values.

Fixes #5922