4c63a5cf24
They are necessary for switches that don't support the feature of modifying 'running' configuration directly; instead, needs to modify 'candidate' configuration and then commit (or discard). Also fix do_get method's comment typo. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>