Use RNG selector

src/freedombone

   if grep -Fxq "random_number_generator" $COMPLETION_FILE; then
       return
   fi
-  if [[ $INSTALLING_ON_BBB != "yes" ]]; then
-      # On systems which are not beaglebones assume that
-      # no hardware random number generator is available
-      # and use the second best option
-      apt-get -y install haveged
-      return
-  fi
   if [[ $INSTALLED_WITHIN_DOCKER == "yes" ]]; then
       # it is assumed that docker uses the random number
       # generator of the host system
   #sed -i 's|#ssl_ca =.*|ssl_ca = /etc/ssl/certs/dovecot-ca.pem|g' /etc/dovecot/conf.d/10-ssl.conf
   #sed -i 's|#ssl_cert_username_field =.*|ssl_cert_username_field = commonName|g' /etc/dovecot/conf.d/10-ssl.conf
   #if ! grep -q "passdb {" /etc/dovecot/conf.d/10-auth.conf; then
-	#echo '' >> /etc/dovecot/conf.d/10-auth.conf
+    #echo '' >> /etc/dovecot/conf.d/10-auth.conf
     #echo 'passdb {' >> /etc/dovecot/conf.d/10-auth.conf
     #echo '  driver = passwd-file' >> /etc/dovecot/conf.d/10-auth.conf
     #echo '  args = /etc/dovecot/passwd-file' >> /etc/dovecot/conf.d/10-auth.conf