fix: Use path with no leading slash for mxdeliv

For compatibility with madmail,
we want to use path with no leading
slash. This change saves us from
having to follow redirects.

Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com>

cmdeploy/src/cmdeploy/nginx/nginx.conf.j2

@@ -73,7 +73,7 @@ http {
 
 		access_log syslog:server=unix:/dev/log,facility=local7;
 
-		location /mxdeliv/ {
+		location /mxdeliv {
 		    proxy_pass http://127.0.0.1:{{ config.filtermail_http_port_incoming }};
 		}