- MFH missing bits and pieces of the partial sync with head

- MFH missing bits and pieces of the partial sync with head
# This time i added:
# ZEND_FE_RESET_VARIABLE
# ZEND_FE_RESET_REFERENCE
# and dapted parser,compiler,executor,interfaces to handle these flags
# their purpose is to be able to pass whetehr foreach is done by ref to
# the current() handler so that it can error out in case it is not capable
# to comply to the requested return signature/protocol/semantics (weyp).