Give context to these logging error messages.

Give context to these logging error messages.

Probably should go through the entire Log library and upgrade the
exception error messages.  Since these messages can't be logged
themeselves (for obvious reasons), they need to be very clear in order
to track down the issue.

Example: today, I got a 'stream could not be written' fatal error (my
logging temp drive was full).  However, it was not immediately obvious
from the error message what subsystem failed.