This fixes an issue where gksudo would successfully authenticate
the user, but fail to run the requested command. This was caused by
gksudo forking a new PTY, meaning that different TTY was used for the
"sudo -v" command and subsequent "sudo -n ..." command. Whilst this used
to work, newer versions of sudo used per TTY authentication caching.
Patch taken from Arch Linux: https://aur.archlinux.org/packages/libgksu/
Also fixed:
- Made Nautilus plugin optional, so gksu can be installed without GNOME
- Added license details, pet portlint
- Tidied patches: move path fixes into port Makefile
1747513894