maintenance: Don't use permanent redirects

They might conflict with the normal configuration, so we don't want
these redirects to get cached.

roles/archweb/templates/maintenance-nginx.d.conf.j2

@@ -16,7 +16,7 @@ server {
 
     location / {
         access_log off;
-        return 301 https://$server_name$request_uri;
+        return 302 https://$server_name$request_uri;
     }
 }
 
@@ -36,7 +36,7 @@ server {
 
     location / {
         access_log off;
-        return 301 https://{{ service_domain }};
+        return 302 https://{{ service_domain }};
     }
 }
 
@@ -54,7 +54,7 @@ server {
 
     location / {
         access_log off;
-        return 301 https://$server_name$request_uri;
+        return 302 https://$server_name$request_uri;
     }
 }
 

roles/maintenance/templates/nginx-maintenance.conf.j2

@@ -12,7 +12,7 @@ server {
 
     location / {
         access_log off;
-        return 301 https://$server_name$request_uri;
+        return 302 https://$server_name$request_uri;
     }
 }
 
@@ -32,7 +32,7 @@ server {
 
     location / {
         access_log off;
-        return 301 https://{{ service_domain }};
+        return 302 https://{{ service_domain }};
     }
 }
 
@@ -50,7 +50,7 @@ server {
 
     location / {
         access_log off;
-        return 301 https://$server_name$request_uri;
+        return 302 https://$server_name$request_uri;
     }
 }