Add a link in the manual from simple-crud to settings-return-all-on-store

[lukaseder]

As suggested here, we should have a link from

• https://www.jooq.org/doc/latest/manual/sql-execution/crud-with-updatablerecords/simple-crud/

To

• https://www.jooq.org/doc/latest/manual/sql-building/dsl-context/custom-settings/settings-return-all-on-store/

To help make people more aware of that setting, which was introduced in jOOQ 3.8 (#1859).

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See also:
https://groups.google.com/forum/#!topic/jooq-user/6n5taSHI7RE