Deprecate remote backup system

src/freedombone-app-akaunting

src/freedombone-app-babybuddy

src/freedombone-app-bdsmail

src/freedombone-app-bludit

src/freedombone-app-cryptpad

src/freedombone-app-datserver

src/freedombone-app-dlna

src/freedombone-app-dokuwiki

src/freedombone-app-edith

src/freedombone-app-emacs

src/freedombone-app-etherpad

src/freedombone-app-fedwiki

src/freedombone-app-friendica

src/freedombone-app-gnusocial

src/freedombone-app-gogs

src/freedombone-app-htmly

src/freedombone-app-hubzilla

src/freedombone-app-icecast

src/freedombone-app-ipfs

src/freedombone-app-kanboard