Code review comment for ~paelzer/ubuntu/+source/open-iscsi:merge-2.1.4-impish

Thanks for the review!

The bullet style was taken as it was in the past, but thanks for the hint - I've updated the Changelog for it.

The autopkgtests on Bileto didn't all kick in, so I had them running myself against the PPA on LP. That was good, I've realized one more thing that would be a pain.

Upgrading a cloud image revealed
(Reading database ... 65987 files and directories currently installed.)
Preparing to unpack .../libopeniscsiusr_2.1.4-0ubuntu1~impishppa1_amd64.deb ...
Unpacking libopeniscsiusr (2.1.4-0ubuntu1~impishppa1) ...
dpkg: error processing archive /var/cache/apt/archives/libopeniscsiusr_2.1.4-0ubuntu1~impishppa1_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/x86_64-linux-gnu/libopeniscsiusr.so.0.2.0', which is also in package libopeniscsiusr0.2.0 2.1.3-1ubuntu6
Preparing to unpack .../open-iscsi_2.1.4-0ubuntu1~impishppa1_amd64.deb ...
Unpacking open-iscsi (2.1.4-0ubuntu1~impishppa1) over (2.1.3-1ubuntu6) ...
Errors were encountered while processing:
 /var/cache/apt/archives/libopeniscsiusr_2.1.4-0ubuntu1~impishppa1_amd64.deb

That makes sense as from a Ubuntu users POV the merge implies a file rename. I'll add what is needed as that is a trivial common case.