start out at 16k, and check for ERANGE also on getpwnam_r
start out at 16k, and check for ERANGE also on getpwnam_r

cvmfs/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,djw8605/cvmfs,Gangbiao/cvmfs,djw8605/cvmfs,djw8605/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs