> dbLoadDatabase("../../dbd/_APPNAME_.dbd",0,0)
is being interpreted as
> dbLoadDatabase("../../dbd/_APPNAME_.dbd","0","0")
If "../../dbd/_APPNAME_.dbd" doesn't exist, this will
next attempt to open "0/../../dbd/_APPNAME_.dbd",
which added to my confusion...
Allowing this while expanding DBD files for IOCs can insert other
device supports before of the Base "Soft Channel" ones, making the
other type the default. Adds a note that DBD file order matters.
Fixes lp: #1908305