[freeipa PR#1843][opened] Allow issuing certificates with IP addresses in subjectAltName (ftweedal)

[frasertweedale]

   URL: https://github.com/freeipa/freeipa/pull/1843
Author: frasertweedale
 Title: #1843: Allow issuing certificates with IP addresses in subjectAltName (ftweedal)
Action: opened

PR body:
"""
Continuation of https://github.com/freeipa/freeipa/pull/1700 by @ipilcher,
adding commits by @ftweedal.

Please keep both PRs open for the time being.
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/1843/head:pr1843
git checkout pr1843