Change exit codes to conform with shellcheck rule

src/freedombone

src/freedombone-addcert

src/freedombone-addremove-base

src/freedombone-adduser

src/freedombone-app-akaunting

src/freedombone-app-babybuddy

src/freedombone-app-batman

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-etesync

src/freedombone-app-etherpad

src/freedombone-app-fedwiki

src/freedombone-app-friendica

src/freedombone-app-gnusocial