This moves material from 2.0_general_info into the index to make an
improved index page.
Some details from the general_info have been moved into the server
concepts, where that information is a better fit.
The general_info page has been expanded with TODOs so we are clear
about some the missing details.
Co-Authored-By: Ed Leafe <ed@leafe.com>
Change-Id: I2a878586d6a073026d1f997e6f0f7ee87a01f726