[BUG] ShiftExpiration writes "invalid Cookie.Domain" error to log when running behind UNIX socket

[kastmgnru]

Describe the bug

When running an Iris application using a UNIX socket (e.g. /var/run/app.sock), invoking the sess.ShiftExpiration(ctx) function produces the following error in the logs, even though session and cookies otherwise work correctly:

net/http: invalid Cookie.Domain "/var/run/app.sock"; dropping domain attribute

To Reproduce

1. Start Iris with a UNIX socket listener:
   l, _ := netutil.UNIX("/var/run/app.sock", 0666) app.Run(iris.Listener(l))

2. Use session middleware, e.g.:
   sess := sessions.New(sessions.Config{ Cookie: "session_id", Expires: 24 * time.Hour, AllowReclaim: true, })

3. In any handler, call:
   sess.ShiftExpiration(ctx)

Expected behavior
No error should be written to logs; Iris should not attempt to use the UNIX socket path as a cookie domain.

Desktop (please complete the following information):
Go version: 1.24.4
OS: Linux
All requests go through nginx, with correct Host header forwarding.

iris.Version
v12.2.11

Thank you!