tasks/sync-ssh-hostkeys: support ansible_port var

gitlab.archlinux.org's host SSH daemon now listens on port 2222. Adjust
the sync-ssh-hostkeys task to take this into account. Port 22 is for GL.

docs/ssh-known_hosts.txt

@@ -71,9 +71,9 @@ gemini.archlinux.org ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIG3ghrZI2G6zc3RKzouAOdg
 gemini.archlinux.org ssh-rsa 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
 
 # gitlab.archlinux.org
-gitlab.archlinux.org ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEBI63C2m0596ZkmtvsR6IDABog4QFxrR2ZWiyR/dpJXS4YnF9+JWKD6N/3h0zLDvfjebAU3vKUpzVmoNwldTRI=
-gitlab.archlinux.org ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJycPRIJd8q+ZFOcVwghbQdSfZ8i/TPoRC6JDGmNFdlI
-gitlab.archlinux.org ssh-rsa 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
+[gitlab.archlinux.org]:2222 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEBI63C2m0596ZkmtvsR6IDABog4QFxrR2ZWiyR/dpJXS4YnF9+JWKD6N/3h0zLDvfjebAU3vKUpzVmoNwldTRI=
+[gitlab.archlinux.org]:2222 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJycPRIJd8q+ZFOcVwghbQdSfZ8i/TPoRC6JDGmNFdlI
+[gitlab.archlinux.org]:2222 ssh-rsa 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
 
 # gluebuddy.archlinux.org
 gluebuddy.archlinux.org ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBIee6Gt+QO0+6MdJK0TQnHOuwkwmmUqHPIoIWZWrwT/0/YaYriU+SO3losnJt385kTCSJfpvWPVdjWB4LABeo04=

playbooks/tasks/sync-ssh-hostkeys.yml

@@ -16,8 +16,8 @@
     - name: Fetch known_hosts
       shell: |
         set -eo pipefail
-        ssh-keyscan 127.0.0.1 2>/dev/null \
-        | sed 's#^127.0.0.1#{{ inventory_hostname }}#' \
+        ssh-keyscan -p {{ ansible_port | default(22) }} 127.0.0.1 2>/dev/null \
+        | sed -E 's/^(\[?)127\.0\.0\.1/\1{{ inventory_hostname }}/' \
         | sort
       environment:
         LC_COLLATE: C.UTF-8  # to ensure reproducible ordering