fix(proxy): [OCISDEV-330] add webdav without trailing slash

Added the `/webdav` endpoint without a trailing slash into the proxy default config.
This makes sure that requests to `/webdav` without a trailing slash are handled
by ocdav service instead of web service.

services/proxy/pkg/config/defaults/defaultconfig.go

@@ -217,6 +217,10 @@ func DefaultPolicies() []config.Policy {
 					Endpoint: "/webdav/",
 					Service:  "com.owncloud.web.ocdav",
 				},
+				{
+					Endpoint: "/webdav",
+					Service:  "com.owncloud.web.ocdav",
+				},
 				{
 					Endpoint:    "/status",
 					Service:     "com.owncloud.web.ocdav",