Some tidy-ups: Don't mention Logo GUIDs in three places; mention
password_hash functionality; add some doc URLs for new features;
grammar & typos; formatting changes.
Fixed Bug #61828 (Memleak when calling Directory(Recursive)Iterator/Spl(Temp)FileObject ctor twice)
Merge branch 'PHP-5.4' into PHP-5.5
Update NEWS
Merge branch 'PHP-5.5'
Fixed bug #64827 Segfault in zval_mark_grey (zend_gc.c)

I can not get a reproduce script since the context is very strict.

Of course I will try to make one, but for now, I just commit this first.
Merge branch 'PHP-5.5'