haproxy config manual update for multiple ports

[Marc]

https://wiki2.dovecot.org/HAProxy

Maybe update this to having multiple ports (if this is even possible)

frontend ft_imap
    bind :110 <<
    bind :143
    mode tcp
    default_backend bk_imap

backend bk_imap
    mode tcp
    balance leastconn
    stick store-request src
    stick-table type ip size 200k expire 30m
    server s1 backend.example.com:10143 send-proxy-v2 <<< how to put more ports here?