zendframework/zf2#6496 zendframework/zf2#6386 - reverting minor bc-break (`attach` method should keep a compatible signature)
zendframework/zf2#6496 zendframework/zf2#6386 - reverting minor bc-break (`attach` method should keep a compatible signature)

svycka/zend-validator,zendframework/zend-validator,Maks3w/zend-validator,akrabat/zend-validator,weierophinney/zend-validator,zf2timo/zend-validator,ezimuel/zend-validator