[dev] Add text description of nodes at the cluster level (context: bug 11372)

I did not include the nodes count in the description, but used a separate field.

The way the description is generated is copy/pasted from abamotd. I propose to start with that, change consumers such as abamotd to use it, and then improve if needed.

assigned to @lnussbau

added 5 commits

• 6f3dc39c...9484286d - 4 commits from branch master
• 91827536 - [dev] Add text description of nodes at the cluster level (context: bug 11372)

Compare with previous version

requested review from @cparisot

added 14 commits

• 91827536...71e75f97 - 13 commits from branch master
• fad2d6e1 - [dev] Add text description of nodes at the cluster level (context: bug 11372)

Compare with previous version

resolved all threads

merged

mentioned in commit 107cd933