issue2550855: added search perms for anonymous to the user class. This lets the "show unassigned" search work for anonymous. Patch by Stuart McGraw. Added warning to upgrading.txt and a comment block before the schema change in every template tracker except minimal (doesn't have the search).

def audit_html_files(db, cl, nodeid, newvalues):
    if newvalues.has_key('type') and newvalues['type'] == 'text/html':
        newvalues['type'] = 'text/plain'
    

def init(db):
    db.file.audit('set', audit_html_files)
    db.file.audit('create', audit_html_files)