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As a result of the experiment, come to the conclusion the receptionist
is easy enough to implement, flexible enough and fast enough to try and
implement it.

Write some advantages and disadvantages of each method how to solve it.

The group prefix is now lower-case.

It was mostly an example and is now merged to the base version. No
longer needed.

Restructure it so the levels are more separated, terms are defined, etc.

Many smaller clarifications and corrections. No change to the described
behaviour.

reviewed by jelte via jabber.

Changes some log message descriptions and some
function arguments and some output.

Make it more up-to-date. Also, provide some info about the want_answer
header and what is being sent over the wire as payload.

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@110 e5f2f494-b856-4b98-b285-d166d9295462