Cbrestorewrapper does not take rehash as an optional arg

Currently, cbrestorewrapper does not take rehash=1 as an extra argument whereas cbbackup does.

I am able to get the cbrestorewrapper to take this argument if I edit the source code to append

 -x rehash=1

to the command line string but I should not have to do this to get this feature to work correctly.

Is this a bug or is it working as intended and I was able to achieve the result I wanted by fluke?

I understand that we are rewriting our backup tool for future releases, but it seems like a small change to fix and it is a pain when trying to use cbrestorewrapper (which we will likely have to support for a year or two into the future anyway).

Upon further testing it appears that cbrestorewrapper does not take any argument specified by the --extra flag correctly.