Made readDirUntil friendlier.
Made readDirUntil friendlier.

BanzaiMan/gcsfuse,BanzaiMan/gcsfuse,jacobsa/timeutil,GoogleCloudPlatform/gcsfuse,GoogleCloudPlatform/gcsfuse,GoogleCloudPlatform/gcsfuse,mbrukman/gcsfuse,jacobsa/ratelimit,kahing/gcsfuse