> Shouldn't you guard this definition with WEBDUINO_SUPRESS_SERVER_HEADER?

I did originally, but checked that once the string isn't referenced, the section containing it is removed by the linker (due to f95122d in this PR on AVR), so it doesn't use any space in flash.

Would you prefer me to wrap it with an `#ifndef WEBDUINO_SUPRESS_SERVER_HEADER` anyway for clarity?