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
Implement operator - for arrays.

Fixes #5923
Fix usermod command in the INSTALL file.

Fixes #5852
Disable migration script until config changes are done.

Refs #5821
Merge 'macros' and 'custom' attributes into 'vars', part 1.

Refs #5855
Implement host checks.

Refs #5919
Add ITL hostcheck command for sample config.

Fixes #5939
Add CompatUtility::IsLegacyAttribute().

Refs #5855