celery: fix for configuration loading
bibdocfile -> legacy.bibdocfile (without config update)
webcomment_templates.py -> legacy/webcomment/templates.py
{solr,xapian}_bibindex* -> legacy.miscutil
weblinkback -> legacy.weblinkback (without config update)
bibcirculation -> legacy.bibcirculation (without config update)
bibschecd -> legacy.bibsched (without config update)
fix bibcirc import
webstat -> legacy.webstat

* To Fix: etc folder, lisp and scripts