Merge branch 'fix-hostinfo-bash-3-2' into 'master'

bash3.2 compatibility for hostinfo

Closes #755

See merge request gitlab-com/migration!185

.gitlab/issue_templates/failover.md

@@ -228,7 +228,7 @@ you see something happening that shouldn't be public, mention it.
 
 - [ ] 🐺 {+ Coordinator +}: To monitor the state of DNS, network blocking etc, run the below command on two machines - one with VPN access, one without.
     * Staging: `watch -n 5 bin/hostinfo staging.gitlab.com registry.staging.gitlab.com altssh.staging.gitlab.com gitlab-org.staging.gitlab.io gstg.gitlab.com altssh.gstg.gitlab.com gitlab-org.gstg.gitlab.io`
-    * Production: `watch -n 5 bin/hostinfo gitlab.com registry.gitlab.com altssh.gitlab.com gitlab-org.gitlab.io gprd.gitlab.com altssh.gprd.gitlab.com gitlab-org.gprd.gitlab.io fe{01..16}.lb.gitlab.com altssh{01..02}.lb.gitlab.com`
+    * Production: `watch -n 5 bin/hostinfo gitlab.com registry.gitlab.com altssh.gitlab.com gitlab-org.gitlab.io gprd.gitlab.com altssh.gprd.gitlab.com gitlab-org.gprd.gitlab.io fe0{1..9}.lb.gitlab.com fe{10..16}.lb.gitlab.comalt ssh0{1..2}.lb.gitlab.com`
 
 
 ### Health check