Merge branch 'cs9_pxe' into 'master'

docs/centos9/docs/bootmedia.md

docs/centos9/docs/index.md

docs/centos9/docs/install.md

docs/centos9/docs/installshots/add-cern-repo.png

docs/centos9/docs/installshots/config.png

docs/centos9/docs/installshots/enterprise-login.png

docs/centos9/docs/installshots/initial-setup.png

docs/centos9/docs/installshots/lang.png

docs/centos9/docs/installshots/partitioning.png

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docs/centos9/docs/installshots/reclaim.png

docs/centos9/docs/installshots/rootpass.png

docs/centos9/docs/installshots/software-selection.png

docs/centos9/docs/locmap.md

docs/centos9/docs/stepbystep.md

docs/installation/aims/aims1.png

docs/installation/aims/aims2client.md

docs/installation/aims/index.md

docs/installation/bootmedia.md

docs/installation/pxeboot.md