Package: vsftpd Version: 3.0.3-12
The option "utf8_filesystem" in "/etc/vsftpd.conf" is not listed in the manual. I might be it's rather self-description, but the default value is not, neither if the option is supported at all. One might think the remarked option in the configfil is simple a left-over from an old version. I hope you will add the option to the man :-)