closes #2783

Update changelog

Add global search options
Backport DCIM global search options from 10.0.0
Add clusters to global search

* Add OS links on Monitors, Peripherals, Phones and Printers

* Use type array for cleaning

Migrate database schema

updated tests for the new DISTINCT crit

updated queries to use the new distinct criteria

fix cs

updated changelog

Replace deprecated fetch_array
Replace deprecated fetch_row
Replace deprecated fetch_assoc
Replace deprectaed data_seek
Replace deprecated insert_id
Replace deprecated list_fields, num_field and field_name
Replace deprecated free_result, missing depreciations in iterator
Replace deprecated affected_rows

Preserve timeline order after merge
Suppress delete ticket notification
Update changelog
closes #5542

Migrate visibility queries parts
Migrate to iterator
Replace addVisibilityRestrict
Change addVisibilityJoins
drop _SESSION['glpi_faqcategories']
Can use condition from an array (direct) or a sha string (session)

Add split ticket feature
Add documentation, closes #914
Track and display source ticket of merged followups
Preserve creation and modifcation dates
Fix promotion/merge event messages
Close tickets that get merged in addition to deleting them

Add unit test
Update changelog