Make output buffering configurable

defaults/main.yml

@@ -40,6 +40,7 @@ php_max_input_time: '60'
 php_max_input_vars: '1000'
 php_memory_limit: '32M'
 php_needs_oci8: false
+php_output_buffering: '4096'
 php_post_max_size: '32M'
 php_register_globals: 'Off'
 php_register_long_arrays: 'On'

templates/etc-php5-apache2-php.ini

@@ -257,7 +257,7 @@ precision = 14
 ; Development Value: 4096
 ; Production Value: 4096
 ; http://php.net/output-buffering
-output_buffering = 4096
+output_buffering = {{ php_output_buffering }}
 
 ; You can redirect all of the output of your scripts to a function.  For
 ; example, if you set output_handler to "mb_output_handler", character