When rebuilding the aliases files, each database
is opened before it is rebuilt or not. The -d38.4
debugging switch shows the success or failure of each open:
map_init(dbtype:name, file, pass) 
from -d38.2
dbtype:name file valid or invalid
The status is valid if the open succeeded;
otherwise, it is invalid.
The -d38.4 debugging switch also shows each map
being looked up in a switch database type (switch):
switch_map_open(name, file, mode) from -d38.2
map_stack[index] = dbtype:name
If the name was not declared in a
K configuration command, the following error is
printed:
Switch map dbtype: unknown member map name
