Description of problem:
Even though downstream libvirt has gained support for multiple devices, the docs doesn't reflect that. Debugging the issue led to the following upstream commit:

commit e396de03f31d87f3e81c7820739951d50367ddb8
Author:     Michal Privoznik <mprivozn@redhat.com>
AuthorDate: Mon Aug 8 11:36:01 2016 +0200
Commit:     Michal Privoznik <mprivozn@redhat.com>
CommitDate: Mon Aug 8 11:49:35 2016 +0200

    docs: Distribute subsite.xsl
    
    So, I've ran into very interesting problem lately. When doing the
    following, I've encountered an error:
    
      libvirt.git $ make dist && tar -xJf libvirt-2.2.0.tar.xz && \
                    cd libvirt-2.2.0 && ./configure && \
                    rm docs/formatdomain.html && make -C docs
    
      make: Entering directory 'docs'
      make: *** No rule to make target 'formatdomain.html', needed by 'web'.  Stop.
      make: Leaving directory 'docs'
    
    I had no idea what was going on, so I've nailed down the commit
    that "broke it" via running git-bisect. It was this one:
    7659bd9221b9dd1cdf. But that shed no more light until I realized
    that the commit might actually just exposed a problem we had. And
    guess what - I've nailed it down. Of course we are not
    distributing subsite.xsl that's why make prints error message.
    Very misleading one I must say.
    
    Signed-off-by: Michal Privoznik <mprivozn@redhat.com>



However, in order to fix the issue in downstream package, we need a bug too.

Version-Release number of selected component (if applicable):

libvirt-2.0.0-4.el7

How reproducible:

100 %

Steps to Reproduce:
1. Install latest libvirt
2. Check that a feature is there and works (e.g. iommu device - bug 1235581)
3. Observe missing no reference to the feature in libvirt-docs

Actual results:
IOMMU device is not mentioned in libvirt-docs.


Expected results:
IOMMU device is mentioned in libvirt-docs.


Additional info: