I would like to bring attention to the FS_DIV constant and $conf['fs_div'] configuration object.
While reviewing files, I first tried to get them used where they should have been, before realizing their uselessness.
They are actually never used, and I honestly doubt they will be someday, as the only system where it could be of any use is Windows, which couldn't be supported without a complete redesign of ISPConfig anyway.
Worst: those fs_div are currently not (yet) used everywhere they should, so it makes them really useless.
Should we do something about them?
Leave them as is, or rip them off anytime we are working on a file using them?