Apache Reference: mod_auth, AuthUserFile
Textual File of Authentication Users
Syntax: AuthUserFile A
Example: AuthUserFile etc/passwd
Since: Apache 1.0
This directive sets the name of a textual file containing
the list of users and passwords for user authentication. The
argument filename consists of the path to the user file. If
not an absolute path name, it is treated as being relative to
ServerRoot. Each line of the user file contains a
user name followed by a colon, followed by the crypt(3)
encrypted password.