fix: follow symlinks when scanning shared folder

[jesterhodl]

Addresses #3
This allows me to have:
/192.168.0.5/music 5,3T 5,3T 3,1G 100% /mnt/music

and then ln -s /mnt/music in ~/.local/share/social.napstr.desktop/Downloads.

What do you think? Or are symlinks intentionally disabled?

[arcbtc]

It’s a tricky one, as limiting sharing to a single folder is an inherent security choice.
I think symlink following would be better as a buried/advanced setting, defaulting to off, which users who specifically want that behaviour can enable.