man/chage.1.xml: Indicate that -d option with a value of 0 forces the user to change his password. Besides, set an example on how to use -E option. Finally, add a general note to clarify that chage only takes charge of local users and another note to indicate that it doesn't check inconsistencies between shadow and passwd files.
The official releases ship with pre-built manpages.
The content of the man pages however is dependent on compile flags. So the
pre-built ones might not fit your version of shadow. To build them yourself use
--enable-man. Furthermore the following build requirements will be needed:
- xsltproc
- docbook 4
- docbook stylesheets
- itstool