Fix Warnung: the "listen ... http2" directive is deprecated (#873)

* Fix Warnung: the "listen ... http2" directive is deprecated

Signed-off-by: Tealk <[email protected]>

* Update templates/web.ssl.template.yml

Co-authored-by: Alan Guo Xiang Tan <[email protected]>

* add on to http2

---------

Signed-off-by: Tealk <[email protected]>
Co-authored-by: Alan Guo Xiang Tan <[email protected]>

Author: Tealk

templates/web.ssl.template.yml

@@ -15,14 +15,16 @@ run:
      filename: "/etc/nginx/conf.d/discourse.conf"
      from: /listen 80;\s+gzip on;/m
      to: |
-       listen 443 ssl http2;
+       listen 443 ssl;
+       http2 on;
        SSL_TEMPLATE_SSL_BLOCK
   - replace:
      filename: "/etc/nginx/conf.d/discourse.conf"
      from: /listen 80;\s+listen \[::\]:80;\s+gzip on;/m
      to: |
-       listen 443 ssl http2;
-       listen [::]:443 ssl http2;
+       listen 443 ssl;
+       listen [::]:443 ssl;
+       http2 on;
        SSL_TEMPLATE_SSL_BLOCK
   - replace:
      hook: ssl