Make it more clear that AuthName takes a single argument, and fix
	a broken example in the FAQ.

PR:		3360
Submitted by:	Jonathan Hartzog <jhartzog@w00f.com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@82360 13f79535-47bb-0310-9956-ffa450edef68