#2409 - Fixed a bug that mounting with ksmid specified to fail #2404 - Fixed ordering problem between fdatasync and flush #2399 - Fixed ListBucket/IAM edge cases #2376 - Corrected list_bucket to search in stat cache during creating new file #2369 - Make dir size 4096 not 0 #2351 - Added option free_space_ratio to control cache size #2325 - Fixed a bug upload boundary calculation in StreamUpload #2298 - Abort MPU when MPU fails to avoid litter #2261 - Use explicit ownership for memory #2179 - Require C++11

Thanks @adamqqqplay, @eryugey, @iainelder, @jmcarpenter2, and @jstastny for opening pull requests to improve s3fs!