added workspace provisioning feature

How about rephrasing the comment as follows:

/**
* Allows access to the Jenkins slave's workspace when the Jenkins slave is offline.
* The assumption here is that the Jenkins slave's root path (configurable via "Remote  * FS Root" option) points to a shared storage location (e.g., NFS mount) accessible to * the Jenkins master.  Note that when the Jenkins slave is online, the workspace is
* directly provided by the slave and the control doesn't reach here. 
**/