Xpra: Ticket #493: when we suspend then resume - immediately try to reconnect to server

Inspired by #492: detect that we have resumed from a suspended state and re-connect to the server since the connection will generally be toast.

on win32, I am seeing:

WM_TIMECHANGE / 0 / 0

WM_TIMECHANGE message: A message that is sent whenever there is a change in the system time.

Fri, 17 Jan 2014 11:53:56 GMT - Antoine Martin: owner, status, description changed

owner changed from Antoine Martin to Antoine Martin
status changed from new to assigned
description modified (diff)

Thu, 20 Mar 2014 05:08:04 GMT - Antoine Martin: status changed; resolution set

status changed from assigned to closed
resolution set to duplicate

superseded by better ticket #540

Sat, 23 Jan 2021 04:57:16 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/493