A largish man-page update

A largish man-page update
- Remove rpmquery and rpmverify manuals for now, the functionality
  didn't get split to separate binaries afterall and the manpages
  were in a rather bad shape afterall.
- Add some missing options, remove no longer existing options
- Remove rpmdb, rpmkeys, rpmsign and rpmspec related switches from
  man rpm manual, add them to the "see also"-section instead
- Adjust database file list on main rpm manual, remove it from rpmbuild man.
(cherry picked from commit c6d98322f1d30ca8028efb63bfde24b554abfda1)