Rework redirections of old content
Rework redirections of old content

Add redirect for old locations.

Fix redirects to go to current location.

This is a new iteration of https://review.openstack.org/#/c/51134 in
smaller steps since that patch had to be reverted

Remove redirect for /openstack-compute, it dates back to Bexar.

Change-Id: I6925d1aaf64b0494a87b293e314acf9174fa4d0b

AlekhyaMallina-Vedams/openstack-manuals,kairoaraujo/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,Akasurde/openstack-manuals,saeki-masaki/openstack-manuals,Akasurde/openstack-manuals,openstack/openstack-manuals,saeki-masaki/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,potsmaster/openstack-manuals,gongysh2004/openstack-manual,kairoaraujo/openstack-manuals,gongysh2004/openstack-manual,potsmaster/openstack-manuals,openstack/openstack-manuals