[RFC] svn patch --patch-cmd

`svn patch` command accepts '--patch-cmd' option, but currently this option
doesn't do anything.

Some other commands accept similar options:
svn cleanup --diff3-cmd
svn diff --diff-cmd
svn merge --diff3-cmd
svn switch --diff3-cmd
svn update --diff3-cmd
svn update --editor-cmd

Do you think that `svn patch --patch-cmd` should be fixed to actually work
or that it should be removed?

-- 
Arfrever Frehtes Taifersar Arahesis