Merge pull request #46877 from robmry/early_error_for_cifs_url_with_port #407

Job	Run time
validate-dco / run	21s
build	2m 1s
test (dockerd, client, integration)	14m 24s
test (dockerd, cmd/buildctl, integration)	5m 45s
test (dockerd, solver, integration)	5m 37s
test (dockerd, frontend, integration)	5m 48s
test (dockerd, frontend/dockerfile, integration)	17m 49s
test (dockerd-containerd, client, integration)	16m 1s
test (dockerd-containerd, cmd/buildctl, integration)	6m 6s
test (dockerd-containerd, solver, integration)	5m 45s
test (dockerd-containerd, frontend, integration)	5m 52s
test (dockerd-containerd, frontend/dockerfile, integration)	19m 3s
	1h 44m 32s

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