- collapse statvfs call, there's no purpose in manually opening the file when libsmbc has a convenience wrapper that does exactly what we need with less code on our end
- blockSize is now calculated as per the conditional branches in smbc_stat.c
- free space calculation is now backwards compatible with slightly busted legacy versions of libsmbc not setting f_bavail
FIXED-IN: 19.12.3
BUG: 298801