boostorg/date_time — pull request #7 by mingulov (2014-03-21 08:43:45+00:00)
Title: #else/#endif comment is updated to the condition

#if BOOST_DATE_TIME_HAS_REENTRANT_STD_FUNCTIONS is used but #else and #endif had been commented with 'BOOST_THREADS', which prevents a proper understanding of the source. Fixed by using a proper comment.