Add docbook information to the manpage
Review Request #124006 - Created June 4, 2015 and submitted
The missing date was making ksshaskpass build non reproduceable, as the date gets generated. (http://bugs.debian.org/787115) So, this change adds the last modified date, and also the other missing fields that were ending up in visible FIXMEs in the generated manpage.
Note for self and doc group: we should investigate if we want to use "KDE User's Manual" or something else, and replace all product name entries from "K Desktop Environment" to something else.