SelectingPoll: use sleep when rlist and wlist are empty (select fails in this case). Closes #131
SelectingPoll: use sleep when rlist and wlist are empty (select fails in this case). Closes #131

glpatcern/rpyc,kwlzn/rpyc,eplaut/rpyc,sponce/rpyc,geromueller/rpyc,gleon99/rpyc,pyq881120/rpyc,pombredanne/rpyc,siemens/rpyc