Help me create a smart dynamic ACL & Action

[planetinse]

Reaching out to the masterminds of HAproxy addon.

Today i have ACL rules (repeated >100 times) like this in my frontend;

ACL
subdom1 IF ssl_fc_sni -i subdom1.domain.com
subdom2 IF ssl_fc_sni -i subdom2.domain.com
subdom3 IF ssl_fc_sni -i subdom2.domain.com

Action
subdom1 use backend bk_subdom1
subdom2 use backend bk_subdom2
subdom3 use backend bk_subdom3
default use bk_default

Can I somewhat use the subdomain name dynamically to address the backend, so instead of 100 rows I will have one single row, and just manage this by adding new backends.