Let's say I wan't to read manual page for dpkg.conf, and there is only one
page matching name "dpkg.conf".
When I type it in yelp_2.14 I get this funny search result page displaying me
one line with link to this manpage.

It should take me directly there. What else can user do when he has just one
link on page?

Just look at the screenshot, and think what you can do here? This page is
completly uselees.

Once again it may be worth to mention that is was working on old good
yelp_2.4... there was a different search mechanism always jumping to first
matching page, and It was very easy to use.