Don't use FTP_USEPASSVADDRESS before php 5.6.18
Don't use FTP_USEPASSVADDRESS before php 5.6.18

See https://github.com/php/php-src/commit/90a26a4844d1acfecb3bd0842da333f8bddd45c6

KnpLabs/Gaufrette,NiR-/Gaufrette,KnpLabs/Gaufrette,NiR-/Gaufrette