rozodiag diskthread command display on several lines
Help distribution of files upon clusters on a bursty creation
The real free size of storages and clusters is computed every 8 seconds.
At that time the clusters of a volume are put in a list ordered by the
most free disk space left. Then each time a file is created the free
size of the cluster is reduced of 256K and the clusters are re-oredered
if necesary.
Change rozodiag "xattr_disable" command to "xattr disable"
When running rozodiag -c all,  xattr_disable disable extended attributes
while xattr just displays a help message
Fix compilation warning