issue2551251 - migrate pbkdf2 passwords if more rounds configured migrate/re-encrypt PBKDF2 password if stored password used a smaller number of rounds than set in password_pbkdf2_default_rounds. Also increase fallback number of rounds (when not set in config) to 2,000,000.

def audit_html_files(db, cl, nodeid, newvalues):
    if 'type' in newvalues 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)