Use a more natural if statement

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-client-element.conf.j2

@@ -69,7 +69,7 @@ server {
 	ssl_certificate_key {{ matrix_ssl_config_dir_path }}/live/{{ matrix_nginx_proxy_proxy_element_hostname }}/privkey.pem;
 
 	ssl_protocols {{ matrix_nginx_proxy_ssl_protocols }};
-	{% if not matrix_nginx_proxy_ssl_ciphers == "" %}
+	{% if matrix_nginx_proxy_ssl_ciphers != "" %}
 	ssl_ciphers "{{ matrix_nginx_proxy_ssl_ciphers }}";
 	{% endif %}
 	ssl_prefer_server_ciphers {{ matrix_nginx_proxy_ssl_prefer_server_ciphers }};

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-dimension.conf.j2

@@ -67,7 +67,7 @@ server {
 	ssl_certificate_key {{ matrix_ssl_config_dir_path }}/live/{{ matrix_nginx_proxy_proxy_dimension_hostname }}/privkey.pem;
 
 	ssl_protocols {{ matrix_nginx_proxy_ssl_protocols }};
-	{% if not matrix_nginx_proxy_ssl_ciphers == "" %}
+	{% if matrix_nginx_proxy_ssl_ciphers != '' %}
 	ssl_ciphers "{{ matrix_nginx_proxy_ssl_ciphers }}";
 	{% endif %}
 	ssl_prefer_server_ciphers {{ matrix_nginx_proxy_ssl_prefer_server_ciphers }};

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-domain.conf.j2

@@ -60,7 +60,7 @@ server {
 	ssl_certificate_key {{ matrix_ssl_config_dir_path }}/live/{{ matrix_nginx_proxy_base_domain_hostname }}/privkey.pem;
 
 	ssl_protocols {{ matrix_nginx_proxy_ssl_protocols }};
-	{% if not matrix_nginx_proxy_ssl_ciphers == "" %}
+	{% if matrix_nginx_proxy_ssl_ciphers != '' %}
 	ssl_ciphers "{{ matrix_nginx_proxy_ssl_ciphers }}";
 	{% endif %}
 	ssl_prefer_server_ciphers {{ matrix_nginx_proxy_ssl_prefer_server_ciphers }};

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-jitsi.conf.j2

@@ -88,7 +88,7 @@ server {
 	ssl_certificate_key {{ matrix_ssl_config_dir_path }}/live/{{ matrix_nginx_proxy_proxy_jitsi_hostname }}/privkey.pem;
 
 	ssl_protocols {{ matrix_nginx_proxy_ssl_protocols }};
-	{% if not matrix_nginx_proxy_ssl_ciphers == "" %}
+	{% if matrix_nginx_proxy_ssl_ciphers != '' %}
 	ssl_ciphers "{{ matrix_nginx_proxy_ssl_ciphers }}";
 	{% endif %}
 	ssl_prefer_server_ciphers {{ matrix_nginx_proxy_ssl_prefer_server_ciphers }};

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-riot-web.conf.j2

@@ -53,7 +53,7 @@ server {
 	ssl_certificate_key {{ matrix_ssl_config_dir_path }}/live/{{ matrix_nginx_proxy_proxy_riot_compat_redirect_hostname }}/privkey.pem;
 
 	ssl_protocols {{ matrix_nginx_proxy_ssl_protocols }};
-	{% if not matrix_nginx_proxy_ssl_ciphers == "" %}
+	{% if matrix_nginx_proxy_ssl_ciphers != '' %}
 	ssl_ciphers "{{ matrix_nginx_proxy_ssl_ciphers }}";
 	{% endif %}
 	ssl_prefer_server_ciphers {{ matrix_nginx_proxy_ssl_prefer_server_ciphers }};

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-synapse.conf.j2

@@ -205,7 +205,7 @@ server {
 	ssl_certificate_key {{ matrix_ssl_config_dir_path }}/live/{{ matrix_nginx_proxy_proxy_matrix_hostname }}/privkey.pem;
 
 	ssl_protocols {{ matrix_nginx_proxy_ssl_protocols }};
-	{% if not matrix_nginx_proxy_ssl_ciphers == "" %}
+	{% if matrix_nginx_proxy_ssl_ciphers != '' %}
 	ssl_ciphers "{{ matrix_nginx_proxy_ssl_ciphers }}";
 	{% endif %}
 	ssl_prefer_server_ciphers {{ matrix_nginx_proxy_ssl_prefer_server_ciphers }};
@@ -240,7 +240,7 @@ server {
 		ssl_certificate_key {{ matrix_nginx_proxy_proxy_matrix_federation_api_ssl_certificate_key }};
 
 	ssl_protocols {{ matrix_nginx_proxy_ssl_protocols }};
-	{% if not matrix_nginx_proxy_ssl_ciphers == "" %}
+	{% if matrix_nginx_proxy_ssl_ciphers != '' %}
 	ssl_ciphers "{{ matrix_nginx_proxy_ssl_ciphers }}";
 	{% endif %}
 	ssl_prefer_server_ciphers {{ matrix_nginx_proxy_ssl_prefer_server_ciphers }};