Separators in custom fields

[simoncn]

Support for backslashes as directory separators in Linux and macOS playlists is now available in MinimServer update 252.

There is a change from what I proposed in post #9 of this thread. For Linux and macOS, a "real" backslash (\) needs to be entered as a double backslash (\\). This is simpler than the original proposal and is consistent with how backslash characters are escaped in many other contexts.