Set qvitter background

src/freedombone-utils-gnusocialtools

                     echo "\$config['site']['qvitter']['sitebackground'] = 'img/bg_custom.${ext}';" >> /var/www/${domain_name}/htdocs/config.php
                 fi
             fi
+        else
+            # qvitter background
+            if [ -d /var/www/${domain_name}/htdocs/local/plugins/Qvitter/img ]; then
+                cd /var/www/${domain_name}/htdocs/local/plugins/Qvitter/img
+
+                # remove any existing image
+                if [ -f bg_custom.${ext} ]; then
+                    rm bg_custom.${ext}
+                fi
+
+                # get the new image
+                wget "$url" -O bg_custom.${ext}
+                if [ ! -f bg_custom.${ext} ]; then
+                    echo "$url"
+                    echo $'Custom background image for Qvitter could not be downloaded'
+                    echo "3"
+                    return
+                fi
+                if ! grep -q "bg_custom.${ext}" /var/www/${domain_name}/htdocs/config.php; then
+                    if grep -q 'sitebackground' /var/www/${domain_name}/htdocs/config.php; then
+                        sed -i '/sitebackground/d' /var/www/${domain_name}/htdocs/config.php
+                    fi
+                    echo "\$config['site']['qvitter']['sitebackground'] = 'img/bg_custom.${ext}';" >> /var/www/${domain_name}/htdocs/config.php
+                fi
+            fi
         fi
     else
         echo "2"