Rear causing slowdown due to find command in /usr

Issue

• When running rear at the same time on multiple servers, those with a common mount point which is under /usr is causing slowdown on the source because it is searching for file menu.c32.

• There is a remote mount on a directory under /usr:

  /dev/vgsap/lv_sap            /usr/sap                xfs rw,inode64 0 0