libs/core: support not-yet-existing interfaces in network model
libs/core: support not-yet-existing interfaces in network model


git-svn-id: f7818b41aa164576329f806d7c3827e8a55298bb@6373 ab181a69-ba2e-0410-a84d-ff88ab4c47bc

mzguanglin/LuCI,mzguanglin/LuCI,mzguanglin/LuCI,mzguanglin/LuCI,mzguanglin/LuCI,mzguanglin/LuCI