It is gone finally… [macOS Server 5.4 changes in High Sierra you need to know about!])https://www.imore.com/changes-macos-server-54-high-sierra)
File Transfer Protocol (FTP): A longtime a security risk, for example for sending password information in clear text, FTP support will be removed from macOS server if you upgrade.
As my xeros printer/scanner suppors only ftp or samba(which is much much slower than the ftp) I have to run my own ftp server in my mac mini.
Just for the record as some environments are mentioned
mbpr15:working cychong$ brew install python ==> Installing dependencies for python: readline, sqlite, gdbm, openssl ==> Installing python dependency: readline ==> Downloading https://homebrew.bintray.com/bottles/readline-7.0.3_1.high_sierra.bottle.tar.gz ######################################################################## 100.0% ==> Pouring readline-7.0.3_1.high_sierra.bottle.tar.gz ==> Caveats This formula is keg-only, which means it was not symlinked into /usr/local, because macOS provides the BSD libedit library, which shadows libreadline. In order to prevent conflicts when programs look for libreadline we are defaulting this GNU Readline installation to keg-only.
brew cask install qlmarkdown brew cask install quicklook-json brew cask install qlprettypatch brew cask install quicklook-csv