Update to upstream version '3.7.4'
with Debian dir af7432fd44f314b1e3b79ab0cae7d9b3412c3d35

We have segfaults/timeouts on buildds I was not able to reproduce yet.

Closes: #1004403

trying to find a not-reproducible segfault

Remove unnecessary constraints

See merge request !2

Update to upstream version '3.7.2'
with Debian dir 1e3e8b3f5f050be927bc9b0cc3c16d6f288689d2

* Build-Depends: Drop versioned constraint on debhelper.

Changes-By: deb-scrub-obsolete

Seems its not installed on all buildds.

Don't ship both files.
Also use manpage from upstream.