Remove Boost dependency from sync.cpp
Remove Boost dependency from sync.cpp

use c++11 for loops instead of BOOST_FOREACH

Signed-off-by: cevap <34c6fceca75e456f25e7e99531e2425c6c1de443@i2pmail.org>

ionomy/ion,ionomy/ion,ionomy/ion,cevap/ion,cevap/ion,cevap/ion,ionomy/ion,ionomy/ion,ionomy/ion,cevap/ion,cevap/ion,cevap/ion