[krbdev.mit.edu #8378] Improve error message "kadmind: No such file or directory while initializing, aborting"

[Karl-Philipp Richter via RT]

The error message `kadmind: No such file or directory while
initializing, aborting` displayed for unknown reasons should be
enhanced by providing the path of the file it references, e.g.
`kadmind: 'No such file or directory' while opening file
'/path/to/file' with '[r/w/x]' access as user 'user' while
initializing [what? the program itself, a dependen, aborting`.

It is pretty obvious that the error message is sadist causing the user
to start guessing or being obliged to unnecessarily
read the manual which always indicates a design error. Consider
reviewing code submission and test standards to avoid future inclusion
of such poor feedback in the code.

experienced with 0533ebf