Support Suspend power mode change

We previously didn't support the Suspend power mode change, which meant WinNUT would be paused in the middle of execution (and with an open socket) if the system goes to sleep. Now WinNUT has the chance to close down operations and connections, which seems to at least help with errors while changing power states. It looks like WinNUT still tries to reconnect too quickly after the system resumes from sleep (before networking is fully restored?) In the interest of reducing notification spam, it may be best to have WinNUT wait a few seconds before reconnecting.

Author: gbakeman

WinNUT_V2/WinNUT-Client/WinNUT.vb

@@ -345,6 +345,9 @@ Public Class WinNUT
     Private Sub SystemEvents_PowerModeChanged(sender As Object, e As Microsoft.Win32.PowerModeChangedEventArgs)
         LogFile.LogTracing("PowerModeChangedEvent: " & [Enum].GetName(GetType(Microsoft.Win32.PowerModes), e.Mode), LogLvl.LOG_NOTICE, Me)
         Select Case e.Mode
+            Case Microsoft.Win32.PowerModes.Suspend
+                LogFile.LogTracing("Suspending WinNUT operations...", LogLvl.LOG_NOTICE, Me, StrLog.Item(AppResxStr.STR_MAIN_GOTOSLEEP))
+                UPSDisconnect()
             Case Microsoft.Win32.PowerModes.Resume
                 LogFile.LogTracing("Restarting WinNUT after waking up from Windows", LogLvl.LOG_NOTICE, Me, StrLog.Item(AppResxStr.STR_MAIN_EXITSLEEP))
                 If My.Settings.NUT_AutoReconnect Then