Backward compatibility broken on options

Since [10974], all preferences elements which list module don't all use the same separators.

This is in the goal of unifying syntax with sout (module1{}:module2{}) but breaks preferences for all elements that were not updated ( extraintf, services-discovery, ...)

We must find a way to handle that smoothly :

• Provide both types of separators
• All use ":" -> problems with backwards compatibility
• ...