divide added to the process list

[Chrischi-]

Divide added to the process list – Sometimes it can be useful to use divide directly instead of multiplication

[Bra1nK]

Might as well add subtract as well if we're going down this road

[Chrischi-]

We should also check all the functions in the file "Modules/process/process_processlist.php".
Here, many of them are taking $time as an argument, but there is no other usage in the function
or in the return of it. I think that this is a copy-and-paste leftover.