Action triggers: added missing triggers to the data dictionnary

These triggers were programmed in
htdocs/core/triggers/interface_50_modAgenda_ActionsAuto.class.php
but were nowhere to be found in the interface because they didn't hit the database.
Action triggers: Added copyright

Reindented the whole block because it was out.
Automatic agenda triggers: uncomment useful syslog

The syslog was commented but is useful to spot unimplemented handlers that were nonetheless
enabled in the administration interface.
Also made it issue a warning level message.
Action triggers: added missing triggers to 3.6 migration script

These are the same changes than commit 3afb3a874d9d1533947651de9db28c9207278908 but for the
migration script
3.6 migration script: fixed invalid comments
Action triggers/Langs: fixed a bad translation key
Added a dev script to recursively deduplicate file lines on a per file basis

This script is useful to deduplicate language files
Deduplicated lines of the reference language files

Used the new deduplicatefilelinesrecursively.sh script
Qual: generic shebang
Added a dev script to help identify duplicate translation keys in language files
Langs: removed duplicate key
Langs: added translation string for action triggers that were missing
Fixed typo
Merge branch 'actiontriggers' of
https://github.com/GPCsolutions/dolibarr into
GPCsolutions-actiontriggers

Conflicts:
	htdocs/langs/de_DE/other.lang
Fix: Can't add user
Syntax error
Fix: Doxygen
anglicized
New: Paypal return for subscription show more information and direct
link into email.
Qual: Better management of error when creating subscription of member
not linked to a third party.
Fix: Missing message keys