"my" variable $host masks earlier declaration in same scope at ./ftp-test.pl
        line 42 (#1)
    (W misc) A "my", "our" or "state" variable has been redeclared in the current
    scope or statement, effectively eliminating all access to the previous
    instance.  This is almost always a typographical error.  Note that the
    earlier variable will still exist until the end of the scope or until
    all closure referents to it are destroyed.