1. In endElementHandler(), responding to an error: don't explain what a

1. In endElementHandler(), responding to an error: don't explain what a
401 error is unless that's the error that happened.

2. In parseWarningHandler() and parseErrorHandler(): issue messages via
the usual logging routines instead of writing them to stdout and stderr.

3. Finish the doxygen-style commenting.

M    include/opensrf/transport_session.h
M    src/libopensrf/transport_session.c

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@1828 9efc2488-bf62-4759-914b-345cdb29e865