Core: Drop UnsafeUtils.

This class potentially does unaligned memory access and does not bring much
now that we switched to global ords for terms aggregations.

Close #6962
Make _all field accessible with GET

GET only returned null even when stored if requested with GET like this:

`curl -XGET "http://localhost:9200/test/test/1?fields=_all"`

Instead, it should simply behave like a String field and return the
concatenated fields as String.

closes #6924
Build: Remove UnsafeUtils from forbidden-apis exclusion list.
[TEST] Add test for _score and doc[] access in Groovy scripts
Docs: Added Tiki Wiki integration

Closes #6746
Docs: Added Tiki Wiki integration

Closes #6746
Docs: Change public signing key instructions to work with sudo

Closes #6823
Test: add more verbosity when this test fails
Test: make test less evil
[TEST] Maven reproductions should always include 'clean' target
Docs: Made current version, branch and jdk into asciidoc attributes
Core: don't load bloom filters by default

This change just changes the default for index.codec.bloom.load to
false: with recent performance improvements to ID lookup, such as
#6298, bloom filters don't give much of a performance gain anymore,
and they can consume non-trivial RAM when there are many tiny
documents.

For now, we still index the bloom filters, so if a given app wants
them back, it can just update the index.codec.bloom.load to true.

Closes #6959
Docs: typo

example fails in bash

Closes #6977