Allow to set log_format's "escape" parameter

[smortex]

Pull Request (PR) description

NGINX can output logs in JSONL format. This requires to set the escape
parameter to NGINX log_format, which the module does not currently
support.

This change is backwards-incompatible

Most users will not be affected, but if you customized the escape parameter with a log_format containing closing and opening quotes in the form "escape=foo' 'actual_format", an update is required. e.g.:

diff --git a/site-modules/profile/manifests/nginx.pp b/site-modules/profile/manifests/nginx.pp
index 1fa15f7..3d5192f 100644
--- a/site-modules/profile/manifests/nginx.pp
+++ b/site-modules/profile/manifests/nginx.pp
@@ -109,7 +108,10 @@ class profile::nginx (
     dynamic_modules           => $dynamic_modules,
     log_mode                  => '0755',
     log_format                => {
-      json_combined => "escape=json' '{${json_log.map |$key, $value| { "\"${key}\":${value}" }.join(',')}}",
+      json_combined => {
+        escape => 'json',
+        format => "{${json_log.map |$key, $value| { "\"${key}\":${value}" }.join(',')}}",
+      },
     },
     http_format_log           => 'json_combined buffer=10m flush=5m',
 

This Pull Request (PR) fixes the following issues

n/a