JAVA-1033: Updated description of fsync write concern flag to reflect 2.6 server behavior.
JAVA-1033: Updated description of fsync write concern flag to reflect 2.6 server behavior.

jsonking/mongo-java-driver,kay-kim/mongo-java-driver,PSCGroup/mongo-java-driver,jyemin/mongo-java-driver,gianpaj/mongo-java-driver,jyemin/mongo-java-driver,rozza/mongo-java-driver,jsonking/mongo-java-driver,rozza/mongo-java-driver