certificate not certkey

src/freedombone-utils-web

                     chown root:Debian-exim /etc/exim4/*.pem
                     chmod 640 /etc/exim4/*.pem
 
-                    sed -i "s|MAIN_TLS_CERTKEY =.*|MAIN_TLS_CERTKEY = /etc/exim4/fullchain.pem|g" /etc/exim4/conf.d/main/03_exim4-config_tlsoptions
-                    sed -i "s|MAIN_TLS_CERTKEY =.*|MAIN_TLS_CERTKEY = /etc/exim4/fullchain.pem|g" /etc/exim4/exim4.conf.template
+                    sed -i "s|MAIN_TLS_CERTIFICATE =.*|MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem|g" /etc/exim4/conf.d/main/03_exim4-config_tlsoptions
+                    sed -i "s|MAIN_TLS_CERTIFICATE =.*|MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem|g" /etc/exim4/exim4.conf.template
                     sed -i "s|MAIN_TLS_PRIVATEKEY =.*|MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem|g" /etc/exim4/conf.d/main/03_exim4-config_tlsoptions
                     sed -i "s|MAIN_TLS_PRIVATEKEY =.*|MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem|g" /etc/exim4/exim4.conf.template
 
         chown root:Debian-exim /etc/exim4/*.pem
         chmod 640 /etc/exim4/*.pem
 
-        if ! grep -q "MAIN_TLS_CERTKEY = /etc/exim4/fullchain.pem" $tls_config_file; then
-            sed -i "/.ifdef MAIN_TLS_CERTKEY/i\MAIN_TLS_CERTKEY = /etc/exim4/fullchain.pem" $tls_config_file
+        if ! grep -q "MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem" $tls_config_file; then
+            sed -i "/.ifdef MAIN_TLS_CERTKEY/i\MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem" $tls_config_file
             email_config_changed=1
         fi
     fi