Encrypts the contents as a Unix style password. Useful when combined
with services that use such passwords.
Unix style passwords are one-way encrypted, to prevent the actual
clear-text password from being stored anywhere. When a login attempt
is made, the password supplied is also encrypted and then compared to
the stored encrypted password.
Example
<wizard name=Password>
<page>Enter your password:
<var name=password type=password size=10>
</page>
<page>Your encrypted password is
<tt><crypt><insert var=password></crypt></tt>.
</page>
</wizard>
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