Comment 6 for bug 1733321

The following systemd upstream commit fixes the service timeout issue:

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commit 8ec1a07998758f6a85f3ea5bf2ed14d87609398f
Author: S. Fan <email address hidden>
Date: Mon Jul 31 05:10:10 2017 -0500

    rfkill: fix erroneous behavior when polling the udev monitor (#6489)

    Comparing udev_device_get_sysname(device) and sysname will always return
    true. We need to check the device received from udev monitor instead.

    Also, fd_wait_for_event() sometimes never exits. Better set a timeout
    here.
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I will check if it also fixes the network-manager testcase.