Livna releases missing: Fedora 18, 19, 20, 21

[Jargon Scott]

Greetings, folks.

This is an issue with Livna, but I'm raising it here as per the support 
instructions at http://rpm.livna.org/ .

http://rpm.livna.org/repo/ seems to be missing releases for recent Fedoras.  The 
most recent one I see is Fedora 17.  Can anyone direct me to the proper route to 
have this addressed?

I didn't notice this problem until one or two weeks ago; I'm fairly sure that 
the now-missing directories had existed until then.  This is what I'm seeing:

# yum --disablerepo="*" --enablerepo=livna update
Loaded plugins: langpacks
http://rpm.livna.org/repo/21/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 
404 - Not Found
Trying other mirror.
No packages marked for update

$ wget http://rpm.livna.org/repo/21/x86_64/repodata/repomd.xml
--2015-02-03 08:57:59--  http://rpm.livna.org/repo/21/x86_64/repodata/repomd.xml
Resolving rpm.livna.org (rpm.livna.org)... 193.28.235.40
Connecting to rpm.livna.org (rpm.livna.org)|193.28.235.40|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2015-02-03 08:57:59 ERROR 404: Not Found.

$ wget http://rpm.livna.org/repo/17/x86_64/repodata/repomd.xml
--2015-02-03 08:58:05--  http://rpm.livna.org/repo/17/x86_64/repodata/repomd.xml
Resolving rpm.livna.org (rpm.livna.org)... 193.28.235.40
Connecting to rpm.livna.org (rpm.livna.org)|193.28.235.40|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 3678 (3.6K) [text/xml]
Saving to: ‘repomd.xml’

repomd.xml          100%[=====================>]   3.59K  --.-KB/s   in 0.001s

2015-02-03 08:58:05 (4.88 MB/s) - ‘repomd.xml’ saved [3678/3678]