Patch from Scott McKellar, finishing off the "log to stderr when all esle fails"...

Patch from Scott McKellar, finishing off the "log to stderr when all esle fails" work:

Currently if we have asked to log to a file, but we haven't yet
specified the name of that log file, then any messages issued are
dropped.

With this patch, any messages issued under these conditions will be
rerouted to standard error.  The rerouting is only temporary,
applying only to the current message.

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@977 9efc2488-bf62-4759-914b-345cdb29e865