is now determined at initialization time. The I/O mode is restored before
the program exits. Previously, any changes to the I/O mode would persist.
git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14801 87f5fb63-7c3d-0410-a384-fd976d0f7a62