Same changes from earlier from the gitless wonder

Details:

Request Routing -> Application Layer Gateway
Remove discussion of "Rights"
Add discussion about issues relating to DHCP options.
Add discussion about who owns the proxy.pac file.
Add discussion about MPTCP.
Remove what might now end well for proxies (who knows?)
Restate what users require
Add environment diversity discussion
Add Scale
Add Improving Interception
Merge pull request #31 from pigdog234/master

Same changes from earlier from the gitless wonder