Centreon 2.6.2

CHANGELOG
Features
Modules can extend actions after restart/reload pollers

Security fixes
#2979 : Secure the type of media which file can be uploaded
Fix some SQL injections

Bug fixes
#3559 : Fix query with MariaDB / MySQL configure in STRICT_TRANS_TABLES
#3554 : Can send acknowledgement with multiline from monitoring page
#3397 : Fix display graph with unicode characters in metric name
#2362 : Correct value when use index_data inserted by Centreon Broker in configuration
#1195 : Display correct number of pollers in status bar
#196 : Display all columns when filter is applied on Monitoring services unhandled view