(bug 55127) Allow user to cut off pending network requests at shutdown
(bug 55127) Allow user to cut off pending network requests at shutdown

If an exception was raised, an extra message is shown to the user,
suggesting to use ctrl-c to abort processing. Otherwise this message
is only shown if the bot is running in verbose mode.

Change-Id: Ie5cf53f97877e61c30e19e10cc2c0fdee647dcac

valhallasw/pywikibot-core,happy5214/pywikibot-core,Darkdadaah/pywikibot-core,wikimedia/pywikibot-core,VcamX/pywikibot-core,happy5214/pywikibot-core,icyflame/batman,darthbhyrava/pywikibot-local,magul/pywikibot-core,magul/pywikibot-core,PersianWikipedia/pywikibot-core,jayvdb/pywikibot-core,hasteur/g13bot_tools_new,xZise/pywikibot-core,TridevGuha/pywikibot-core,smalyshev/pywikibot-core,h4ck3rm1k3/pywikibot-core,npdoty/pywikibot,hasteur/g13bot_tools_new,npdoty/pywikibot,h4ck3rm1k3/pywikibot-core,jayvdb/pywikibot-core,trishnaguha/pywikibot-core,wikimedia/pywikibot-core,emijrp/pywikibot-core,hasteur/g13bot_tools_new,Darkdadaah/pywikibot-core