- Add patch man-db-2.9.4-alternitive.dif
* Supporting ALSO new `alternatives` which has the same tasks as
`update-alternatives` but in a simplier way.

- Update to version 2.9.4:
* Add support for zstd-compressed manual pages
* Recognise Esperanto, Romanian, Tamil, and Ukrainian translations
of the NAME section.
* Fix handling of \- in the right-hand side of a NAME section.
* Treat "\[en]" (etc.) as another synonym for "\-" in NAME sections,
alongside the existing "\(en" (etc.).
* Avoid incorrect markup in man(1) with po4a >= 0.58.
* Fix manual page translation infrastructure to compare po4a
versions with more than two components correctly.
* Fix "man -X75-12" and "man -X100-12" to set the document font
size as well as the device
* Fix incompatibility of "man -X" and friends with the seccomp
sandbox.
* man --recode and manconv now adjust encoding declarations on the
first line of their input to refer to the new encoding.
* There is a new "man-recode" program. Which has an interface
designed for bulk conversion and so can be much faster when
used on a large number of pages.
* Fix comparison of candidate manual pages to correctly handle the
case where the language elements are the same and match the
locale, but the territory elements differ.
* If run with no arguments or only a section, man now suggests
running "man man".
* man now understands the () form on its command
line, so for example "man 'chmod(2)'" is now the same as