checkIsHostForProgram function takes a new 'logic' argument.
It determines which logic should be used to look up for program entity. If the argument is not given, the standard program_logic will be used.
"""
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"