Source for sci-mathematics/ratpoints is broken

[ss23]

>>> Emerging (7 of 228) sci-mathematics/ratpoints-2.1.3-r4::sage-on-gentoo
>>> Downloading 'https://www.mathe2.uni-bayreuth.de/stoll/programs/ratpoints-2.1.3.tar.gz'
--2020-04-27 19:41:09--  https://www.mathe2.uni-bayreuth.de/stoll/programs/ratpoints-2.1.3.tar.gz
Resolving www.mathe2.uni-bayreuth.de... 132.180.22.143
Connecting to www.mathe2.uni-bayreuth.de|132.180.22.143|:443... failed: Connection timed out.
Retrying.

--2020-04-27 19:41:43--  (try: 2)  https://www.mathe2.uni-bayreuth.de/stoll/programs/ratpoints-2.1.3.tar.gz
Connecting to www.mathe2.uni-bayreuth.de|132.180.22.143|:443... failed: Connection timed out.
Retrying.

--2020-04-27 19:42:16--  (try: 3)  https://www.mathe2.uni-bayreuth.de/stoll/programs/ratpoints-2.1.3.tar.gz
Connecting to www.mathe2.uni-bayreuth.de|132.180.22.143|:443... failed: Connection timed out.
Giving up.

>>> Downloading 'http://ftp.swin.edu.au/gentoo/distfiles/07/ratpoints-2.1.3.tar.gz'
--2020-04-27 19:42:48--  http://ftp.swin.edu.au/gentoo/distfiles/07/ratpoints-2.1.3.tar.gz
Resolving ftp.swin.edu.au... 136.186.1.76
Connecting to ftp.swin.edu.au|136.186.1.76|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2020-04-27 19:42:49 ERROR 404: Not Found.

!!! Couldn't download 'ratpoints-2.1.3.tar.gz'. Aborting.
 * Fetch failed for 'sci-mathematics/ratpoints-2.1.3-r4', Log file:
 *  '/var/tmp/portage/sci-mathematics/ratpoints-2.1.3-r4/temp/build.log'

>>> Failed to emerge sci-mathematics/ratpoints-2.1.3-r4, Log file:

>>>  '/var/tmp/portage/sci-mathematics/ratpoints-2.1.3-r4/temp/build.log'

 * Messages for package sci-mathematics/ratpoints-2.1.3-r4:

 * Fetch failed for 'sci-mathematics/ratpoints-2.1.3-r4', Log file:
 *  '/var/tmp/portage/sci-mathematics/ratpoints-2.1.3-r4/temp/build.log'

[kiwifb]

Closed by #585