CloudStack LTS Release 4.22.0.0

4.20.2 release note (apache#583)

extensions: update note on inbuilt orcehstrator (apache#554)

Now that we have a section on limitations, operator may refer that to
see things which are not supported at the moment.

Signed-off-by: Abhishek Kumar <[email protected]>

revert removal of ubunut EOL version (apache#522)

4.19.3 release notes (apache#508)

* Xen-like limitations for ISO use

* conserve mode in new 4.19 envs upgraded to 4.19.3

* 4.19.3 paragraph

* add userdata limitation.

* 4.19.3 changes

* release

* highlights

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Co-authored-by: Daan Hoogland <[email protected]>

add config path (apache#489)

Co-authored-by: João Jandre <[email protected]>

new sphinx req: conf location

Release 4.19.1.3

Release 4.18.2.5

Release 4.19.1.2

Signed-off-by: Rohit Yadav <[email protected]>