postfix: fixup ssl cert location

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

roles/postfix/templates/main.cf

@@ -40,8 +40,8 @@ milter_data_macros = j i {daemon_name} v {if_name} _
 # TLS stuff
 # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
 # information on enabling SSL in the smtp client.
-smtpd_tls_cert_file = /var/lib/dehydrated/certs/{{ inventory_hostname }}.fullchain.crt
-smtpd_tls_key_file = /var/lib/dehydrated/certs/{{ inventory_hostname }}.key
+smtpd_tls_cert_file = {{ ssl_home }}/localcerts/{{ inventory_hostname }}.fullchain.crt
+smtpd_tls_key_file = {{ ssl_home }}/localcerts/{{ inventory_hostname }}.key
 smtpd_tls_ask_ccert = yes
 smtp_tls_security_level = may
 smtpd_tls_security_level = may