Viewer clients should use SSIDs starting with 91, unless you are intentionally trying to spoof a box.
Let the server choose the SSID (Ignores SSID above)
Changes the startup logo that pops up when you launch the viewer.
This legacy option has little impact on minisrv servers, although certain advanced server operators may use these flags to determine what your "box" can do, and as such, may offer features that do not work in the Viewer, especially older ones.