posix: parseDirents() should follow symlink and get values. (#1631)
posix: parseDirents() should follow symlink and get values. (#1631)

Previously parseDirents() ignores symbolic links.  This patch fixes
the issue by following the symlink using os.Stat().

Fixes #1545
hackintoshrao/minio,luomeiqin/minio,rushenn/minio,mf-00/newgo,jimjag/minio,harshavardhana/minio,NitishT/minio,abperiasamy/minio,krishnasrinivas/minio,krishnasrinivas/minio,dvstate/minio,luomeiqin/minio,abperiasamy/minio,harshavardhana/minio,harshavardhana/minio,dvstate/minio,fwessels/minio,alexellis/minio,aead/minio,dutchcoders/minio,minio/minio,mkash32/minio,abperiasamy/minio,luomeiqin/minio,krishnasrinivas/minio-daily,krishnasrinivas/minio,brendanashworth/minio,krisis/minio,brendanashworth/minio,rajivm/minio,jimjag/minio,abperiasamy/minio,brendanashworth/minio,harshavardhana/minio,dvstate/minio,rushenn/minio,krishnasrinivas/minio-daily,fwessels/minio,dutchcoders/minio,koolhead17/minio,harshavardhana/minio,vadmeste/minio,aead/minio,donatello/minio,minio/minio,mkash32/minio,balamurugana/minio,fwessels/minio,rushenn/minio,rajivm/minio,harshavardhana/minio,brendanashworth/minio,donatello/minio,aead/minio,hackintoshrao/minio,dutchcoders/minio,krisis/minio,dvstate/minio,krishnasrinivas/minio,harshavardhana/minio,NitishT/minio,jimjag/minio,balamurugana/minio,aead/minio,fwessels/minio,rushenn/minio,aead/minio,mf-00/newgo,aead/minio,alexellis/minio,dutchcoders/minio,luomeiqin/minio,NitishT/minio,aead/minio,koolhead17/minio,vadmeste/minio,hackintoshrao/minio,NitishT/minio,hackintoshrao/minio,jimjag/minio,aead/minio,harshavardhana/minio