Some files that should have their copyrights checked are still placed on the
copyright ignore list.
- These entries have been tidied up
- Copyrights of those files have been updated.
linux/lwip: Wrap some IO posix functions
* to workaourd the FreeRTOS EINTR issue (when building without lwip)
* to correctly choose the sub-system based on fd (when building with
lwip) -- passing control to either linux/system or to lwip
This commit also addapts tapio-if to provide DHCP client by default and
configurable settings for static IP
