[CentOS] logrotate.d - reload vs restart

Looking at some of the stuff in /etc/logrotate.d, I see entries like this in
some of the configuration files:

postrotate
	/sbin/service privoxy reload  2> /dev/null || true

>From the commandline, that doesn't work:

# /sbin/service privoxy reload  2> /dev/null || true
Usage: /etc/init.d/privoxy {start|stop|restart}

Changing reload to restart does work:

]# /sbin/service privoxy restart 2> /dev/null || true
Stopping Privoxy, OK.
Starting Privoxy, OK.

I find "reload" in the httpd logrotate file as well:

postrotate
        /sbin/service httpd reload > /dev/null 2>/dev/null || true

What am I failing to understand?

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