Add host config to the security documentation
add host to the config page
line break
Add versionadded tag to security config reference, reference cookbok entry in book
remove versionadded from book and fix words
feature #3454 [Security] Add host option (ghostika)

This PR was merged into the 2.4 branch.

Discussion
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[Security] Add host option

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.4+
| Fixed tickets | #3453

Host option is missing from documentation and this feature was introduced in 2.4 for the firewall.

Commits
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6cba192 remove versionadded from book and fix words
3e42b84 Add versionadded tag to security config reference, reference cookbok entry in book
cc8d19a line break
0244173 add host to the config page
4fb6e59 Add host config to the security documentation