[ticket/12489] Add notice about %s wildcard in FIELD_IS_CONTACT_EXPLAIN

PHPBB3-12489
[ticket/12987] Cleanup the services.yml file

PHPBB3-12987
Merge pull request #3002 from Nicofuma/ticket/12987

[ticket/12987] Cleanup the services.yml file

* Nicofuma/ticket/12987:
  [ticket/12987] Cleanup the services.yml file
[ticket/12489] Language correction

PHPBB3-12489
Merge pull request #2942 from Senky/ticket/12489

[ticket/12489] Description for Contact link in custom profile fields