Increase kernel.pid_max to a higher value

While running big boxes with 72 disks it's easy to get out of PID for
all the threads needed by Ceph. Increasing the default value removes
this limitation.

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>
Merge pull request #138 from leseb/increase-pid-max

Increase kernel.pid_max to a higher value
Use Giant version

Use the last stable version: Giant

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>
Merge pull request #139 from leseb/use-giant

Use Giant version
Add a client section in the ceph configuration file

In this section we enabled the rbd cache and a socket per client.

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>
Merge pull request #140 from leseb/rbd-cache

Add a client section in the ceph configuration file
Merge pull request #2 from ceph/master

Rebase from upstream