Displays usage of an admin command to users depending on the setting of the sm_show_activity cvar.
This version does not display a message to the originating client if used from chat triggers or menus. If manual replies are used for these cases, then this function will suffice. Otherwise, ShowActivity2() is slightly more useful.
void ShowActivity(int client, const char format, any... ...)
Client index doing the action, or 0 for server.
Variable number of format parameters.