Fix appends

src/freedombone-app-radicale

     else
         # alter the existing site config
         if ! grep "radicale" /etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}; then
-            sed -i '@443@a
-    location /radicale {
-        auth_basic "Radicale";
-        auth_basic_user_file /var/www/radicale/users;
-        proxy_pass http://127.0.0.1:52322;
-    }
-' /etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}
-            sed -i '@listen 127.0.0.1@a
-    location /radicale {
-        auth_basic "Radicale";
-        auth_basic_user_file /var/www/radicale/users;
-        proxy_pass http://127.0.0.1:52322;
-    }
-' /etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}
+            sed -i '/443/a    location \/radicale {\n        auth_basic "Radicale";\n        auth_basic_user_file \/var\/www\/radicale\/users;\n        proxy_pass http://127.0.0.1:52322;\n    }' /etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}
+            sed -i '/listen 127.0.0.1/a    location \/radicale {\n        auth_basic "Radicale";\n        auth_basic_user_file \/var\/www\/radicale\/users;\n        proxy_pass http://127.0.0.1:52322;\n    }' /etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}
         fi
     fi