Zakap, we work around the server full issue using sv_visiblemaxplayers, but, then admins can't use the Server menu, they have to connect manually.
We also don't enable it by default.
404error,
See server.ini file in addons/ulx/cfg/server.ini
Specifically, section that looks like
ulx rslotsMode 0
ulx rslots 2
ulx rslotsVisible 1 // When this is 0, sv_visiblemaxplayers will be set to maxplayers - slots_currently_reserved
//Modes:
//0 - Off
//1 - Keep # of slots reserved for admins, admins fill slots.
//2 - Keep # of slots reserved for admins, admins don't fill slots, they'll be freed when a player leaves.
//3 - Always keep 1 slot open for admins, kick the user with the shortest connection time if an admin joins.
When you make changes to server.ini, SAVE IT TO /gmod/cfg/server.ini , NOT back to addons/ulx/cfg ... this way, when you update anytime, your changes don't get
overwritten.
If turn off (0) rslotsVisible, if you set 2 reserves slots on an 8 member server, it will look like it only has 6 capable.
Your priveledged non-user group people will need to know to use the console to type "connect ip:port" to fill those two additional spots.
Once you have that set up, you'll need to do, I think, ulx addgroup member "ulx reservedslots"
I might be wrong on that flag. Megiddo or spbogie can verify that for me (or, you can test)