[InterNetNews/inn] 1425b3: readers.conf: Simplify examples by not using a domain

[Julien ÉLIE]

  Branch: refs/heads/2.7
  Home:   https://github.com/InterNetNews/inn
  Commit: 1425b3a6dca8693c8fd5d1985dc125fc32cf34ad
      https://github.com/InterNetNews/inn/commit/1425b3a6dca8693c8fd5d1985dc125fc32cf34ad
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2022-11-18 (Fri, 18 Nov 2022)

  Changed paths:
    M doc/pod/install.pod
    M doc/pod/readers.conf.pod
    M samples/readers.conf

  Log Message:
  -----------
  readers.conf: Simplify examples by not using a domain

It will be easier to understand at first read.  (A complex example with
default domains is still present and documented in readers.conf.)