Provides a daemon for changing passwords over the network. This feature
is commonly used for TCP loopback password changing from web scripting
languages such as Perl and PHP, removing the requirement for setuid perl
scipts or running a web server process as root. This version of poppassd
has PAM support, and also optional support for cracklib enforcing the use
of strong passwords. Note that the protocol is plain text and so insecure
for all but loopback use.