Description:
------------
php-fpm generate log files with a default permission 0600,which makes other user or group unable to read the slow log or access log. So I make a patch to fixed this problem , which allows users to configure the file permission as they wanted. The entry in fpm configuration is file_mode directive.

fpm configruation:
slowlog = log/$pool.log.slow
request_slowlog_timeout = 5
request_terminate_timeout = 10

New feature:
   file_mode = 0644 //or other file permission u want.



Test script:
---------------
<?php
sleep(10)；
echo "hello world";
?>


Expected result:
----------------
I expect fpm generate a slow log with file permission that other people are able to read.

Actual result:
--------------
ls -la www-slow_log 
-rw------- 1 root root 0 Apr 23 02:03 www.log.slow 

Actually， It generate a slow log with file permission 0666(-rw- --- ---),which makes other people unable to read. It's quite inconvenient, since I want some other development people to read it.