python-docutils v0.6 will have to do.

Seems like requiring a version from 2010 was way optimistic.

EL6 has v0.6 which was the first version rst2man appeared in.

doc/changes.rst

@@ -17,7 +17,7 @@ New since 4.0.0:
   https://www.varnish-cache.org/docs/trunk/phk/persistent.html
 - Added format flags %I (total bytes received) and %O (total bytes sent) for
   varnishncsa.
-- python-docutils >= 0.7 is now required.
+- python-docutils >= 0.6 is now required.
 - Support year (y) as a duration in VCL.
 - VMOD ABI requirements are relaxed, a VMOD no longer have to be run on the
   same git revision as it was compiled for. Replaced by a major/minor ABI counter.

redhat/varnish.spec

@@ -18,7 +18,7 @@ BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 # You will need at least automake autoconf libtool
 #BuildRequires: automake autoconf libtool
 BuildRequires: ncurses-devel groff pcre-devel pkgconfig libedit-devel jemalloc-devel
-BuildRequires: python-docutils >= 0.7
+BuildRequires: python-docutils >= 0.6
 Requires: varnish-libs = %{version}-%{release}
 Requires: logrotate
 Requires: ncurses