Simplify

src/freedombone-utils-gnusocialtools

         fi
 
         if [ -d /var/www/${domain_name}/htdocs/static ]; then
-            cd /var/www/${domain_name}/htdocs/static
-            cp ../bg_custom.${ext} bg_custom.${ext}
-            sed -i "s|\"background\":.*|\"background\": \"/static/bg_custom.${ext}\",|g" config.json
+            cp bg_custom.${ext} static/bg_custom.${ext}
+            sed -i "s|\"background\":.*|\"background\": \"/static/bg_custom.${ext}\",|g" static/config.json
         fi
 
         qvitter_update_background ${domain_name} ${ext}