[DOC] Clarify settings and documentation about norms.
Internally manipulate the terms execution hint as an enum instead of a String.

Close #5530
Temp. disable use of new PagedBytesReference since it breaks HTTP replies with 0-sized Content-Length
Update Documentation Feature Flags [1.1.0]
Added versions 1.1.1, 1.0.3 & 0.90.14
Fix compilation error from last commit.
Fix PMD warning: don't reassign method parameters.
[TEST] Make sure that there are no relocating shards before taking snapshot

Temporary workaround for #5531
[TEST] Added extra test for multi fields with default `include_in_all` settings, in which only the main field should end up in the `_all` field.
add uppercase token filter

closes #5539