Issue 120: sentinel reporting error writing to config file. open(O_RDONLY) followed by fsync() would result in access denied error in windows. In the context of the code changed, ifdefing out fsync on Windows was the safest thing to do.
Merge branch '2.8' of https://github.com/MSOpenTech/Redis into 2.8

Conflicts:
	bin/release/redis-2.8.9.zip