Release 2.4.1 Improve update manager and solve small bugs

What's Changed

Update_manager:

• Check that php curl extension is loaded.
• Copy also cgi-bin subfolders ansi and utf8. Set executable permissions on executables
• Print the log file timestamp in the server timezone (only on linux servers) Version_checker:
• Moved json file to upgrade folder
• Corrected repository name (ABCD2->ABCD)

See all changed files for more details

Actions by database administrator

The upgrade of the code can be done with the upgrade manager.