Changed display_name to name_on_certificates in models/role.py. This is to make the intention of this property more clear as to display_name which would remind people of for instance nicknames or a replacement for their public name for this role. Patch by: Lennard de Rijk Reviewed by: to-be-reviewed

"""
Code used in a couple of places to work with the current thread's environment.
Current users include i18n and request prefix handling.
"""

try:
    import threading
    currentThread = threading.currentThread
except ImportError:
    def currentThread():
        return "no threading"