zendframework/zf2#6218 - applying hotfix for `iconv.internal_encoding` deprecation
zendframework/zf2#6218 - applying hotfix for `iconv.internal_encoding` deprecation

See https://wiki.php.net/rfc/default_encoding

 > PHP 5.6 and master, introduce new php.ini setting. Old iconv.*/mbstring.* php.ini parameters will be removed for master PHP6. Use of iconv.*/mbstring.* php.ini parameters raise E_DEPRECATED for 5.6 and up.

zendframework/zend-xmlrpc,MadCat34/zend-xmlrpc,samsonasik/zend-xmlrpc