log to syslog by default

defaults/main.yml

@@ -79,3 +79,4 @@ phpinidefault:
   memory_limit: 128M
   date_timezone: UTC
   session_gc_maxlifetime: 1440
+  syslog: true

templates/php-fpm/php.ini.j2

@@ -571,7 +571,9 @@ html_errors = On
 ; Example:
 ;error_log = php_errors.log
 ; Log errors to syslog (Event Log on Windows).
-;error_log = syslog
+{% if phpini.syslog %}
+error_log = syslog
+{% endif %}
 
 ;windows.show_crt_warning
 ; Default value: 0