- no unneccessary retval initialization
- new c-level iterator handler invalidate_current that is optionally
used to clear internal caching like in implementation of Iterator

Capture potential problem by error message

preserve ZEND_API in definition

Clearify the different method/class flags (as discussed with Andi).

Rename hasMore() to valid() as discussed. (Part II)

Rename hasMore() to valid() as discussed. (Part I)

- Check return-by-reference bit when implementing interface prototypes
- Add infrastructure for built-in functions to hint whether they
return by reference or not. It is NOT currently used

- Check return-by-reference bit when implementing interface prototypes
- Add infrastructure for built-in functions to hint whether they
return by reference or not. It is NOT currently used for anything,
except for interface prototypes (you can use it to request that the
function that implements your prototype returns by reference or
doesn't return by reference).
For downwards compatibility - by default, interface prototypes are
agnostic as to whether the function that implements them returns
by reference or not. Use ZEND_BEGIN_ARG_INFO_EX() with
ZEND_RETURN_VALUE/ZEND_RETURN_REFERENCE to change that.
- Fix ArrayAccess::getOffset() to conduct additional checks.
If your getOffset() should work with multidimensional arrays - it
must return by reference.

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- Export struct zend_user_iterator
- Ad 'it' to function prefix to prevent naming clashes
- Export zend_user_it_free_current

#where has my bracket been gone?

Fix inheritance rule for interface Traversable

- Happy new year and PHP 5 for rest of the files too..
# Should the LICENSE and Zend/LICENSE dates be updated too?

Add new interface ArrayAccess to use objects as Arrays

Use correct order

Use correct macro/function

Correct destruction

IteratorAggregate::getIterator() cannot return anythingy else than objects

Little iterator improvement: ability to store index in iterator

Prevent some SEGV's when Exceptions are thorown inside iterators.

Give some freedon to c iterators but not in userspace.

Impement userspace iterator interfaces and tests. See tests for details
on the names.