Remove extra 'processors' anchor in threadpool docs
Fix comment grammar
Support the `has_child`, `has_parent`, `top_children` queries (and filters) in other apis than just search api. The queries are also now supported in count, explain (return dummy explination) and delete by query apis.
Migrate SearchContext.Rewrite to Releasable. All the parent child queries are now implemented as Lucene queries and the state is kept in the Weight.
Completely disable caching for `has_child` and `has_parent` filters, this has never worked and it also can also never work. The matching docIds are cached per segment while the collection of parent ids is top level.

Closes #3822
Add monitoring link for es2graphite.
Added QueryBuilders#fuzzyQuery method that accepts value parameter as an object

Fixed javadocs

Closes #3616
Fix broken links in example configuration file