ignore udf_example.so in badfuncs check
    
    Resolves: #2047868
    
    udf_example.so contains following deprecated functions:
    gethostbyaddr
    gethostbyname
    inet_addr
    inet_ntoa
    
    The udf_example.so can be ignored from badfuncs check, because it is an
    exemplary file, showing users how to write own loadable functions. Even
    though code from this .so can be used in mysql server, it needs to be
    manually loaded by the user.
    
    Deprecated functions have been reported upstream [1].
    
    [1] https://bugs.mysql.com/bug.php?id=106797