fdescfs is the filesystem mounted on /dev/fd to provide access to file descriptors via filsystem paths. It is not a real filesystem used on disks. https://bugzilla.gnome.org/show_bug.cgi?id=748790
https://bugzilla.gnome.org/show_bug.cgi?id=721514
Patch by Joe Marcus Clarke <marcus@freebsd.org>. Closes #548184. svn path=/trunk/; revision=2767