Now devOptions("X11") works (again after x11 -> X11)

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r-dots@2101 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r-dots@2102 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r-dots@2103 edb9625f-4e0d-4859-8d74-9fd3b1da38cb