libs/core: further fixes for luci.util.pcdata(), fix wrong character range and drop invalid control chars entirely
libs/core: further fixes for luci.util.pcdata(), fix wrong character range and drop invalid control chars entirely


git-svn-id: f7818b41aa164576329f806d7c3827e8a55298bb@4118 ab181a69-ba2e-0410-a84d-ff88ab4c47bc

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