More and more people are using one of the first 3 methods of install
(the ones that don't involve running "src/gl-easy-install" from the
client side) usualy due to RPM/DEB being available now.
Previously, the ending message on running that command was serving this
purpose, and so it never really got written down in so many words.
[thanks to antgel for catching this]
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while we were there, we removed a now-obsolete section that talks about
how to use just one key; there are better methods now
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