feat: Make DLNA port configurable (#4836)

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Signed-off-by: Ivan Pedrazas <ipedrazas@gmail.com>
Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

internal/manager/config/config_concurrency_test.go

@@ -97,6 +97,7 @@ func TestConcurrentConfigAccess(t *testing.T) {
 				i.Set(DLNADefaultEnabled, i.GetDLNADefaultEnabled())
 				i.Set(DLNADefaultIPWhitelist, i.GetDLNADefaultIPWhitelist())
 				i.Set(DLNAInterfaces, i.GetDLNAInterfaces())
+				i.Set(DLNAPort, i.GetDLNAPort())
 				i.Set(LogFile, i.GetLogFile())
 				i.Set(LogOut, i.GetLogOut())
 				i.Set(LogLevel, i.GetLogLevel())