ENH: Make '/' at the end of URLs in cofig optional

src/caosdb/schema-pycaosdb-ini.yml

@@ -16,7 +16,7 @@ schema-pycaosdb-ini:
         url:
           description: URL of the CaosDB server
           type: string
-          pattern: https://[-a-zA-Z0-9\.]+(:[0-9]+)?/
+          pattern: https://[-a-zA-Z0-9\.]+(:[0-9]+)?(/)?
           examples: [https://demo.indiscale.com/, https://localhost:10443/]
         username:
           type: string

unittests/broken_configs/pycaosdb-indiscale-demo.ini

-[Connection]
-url=https://demo.indiscale.com
-username=admin
-password=caosdb
-password_method=plain
-cacert=/etc/ssl/cert.pem
-
-timeout=10000
-debug=0
-
-[Container]
-debug=0
\ No newline at end of file