URL formatting not compatible with special characters in file paths strangely

It seems as if the URL formatting is not 100% compatible with the URL formatting causing some filesystem function not to function properly.

A possible reproduction of this incident is shown with the screenshots.

(from redmine: issue id 2415, created on 2016-07-08 by root, closed on 2016-07-12)

• Uploads:
  • Create a directory e.g. with a # in the name
  • Open the directory and the URL is fine
  • Open a file in the directory, the URL is incorrect ...
  • ...causing some trouble in the filesystem