MFC r255488:
Don't issue USB resume signalling in USB device mode, if the USB power
mode is ON and suspend is detected. This confuses iPads running in USB
host mode at least.
Merge from r245741 from head:

  If lagg(4) can't forward a packet due to underlying port problems,
  return much more meaningful ENETDOWN to the stack, instead of EBUSY.
MFC r255340:

Long URLs don't always appear even with autosizing and other tricks. So,
add some whitespace to put the URL on a line by itself, maximizing view.

MFC r255341:

Remove unnecessary mediaClose (FTP operations are done with either ftp(1)
or fetch(1), neither of which are stateful, compared to how sysinstall(8)
did FTP operations, maintaining an open session until mediaClose).
Merge remote-tracking branch 'upstream-github/stable/9' into stable/9