[CentOS] httpd and selinux

Hello,

Running httpd-2.2.3-43.el5.centos.3 on CentOS release 5.5 (Final), I
have :

$ ps -Ze
LABEL                             PID TTY          TIME CMD
user_u:system_r:httpd_t         12833 ?        00:00:00 httpd

Is it normal for httpd to have this context (user_u:system_r:httpd_t) ?
I was expecting system_u:system_r:httpd_t.

And if it is not normal, is it because I have restarted httpd by hand
(service httpd restart), or because I have broken something in my
configuration ?

Thanks,

-- 
Philippe