Way to make Tomcat re-read tomcat-users.xml without having to restart Tomcat?

[Jonathan Eric Miller]

I noticed that it appears that Tomcat 4 only reads tomcat-users.xml on start
up. Does anyone know if there is a way to programatically tell Tomcat to
re-read this file?

Basically, I want to have a Web page that allows a user to change their
password. However, I don't want to have to restart Tomcat in order for the
change to take affect.

Also, does anyone know if there is a way to store the passwords crypt
encrypted instead of in clear-text?

Also, what about authentication via LDAP?

Jon