/usr/lib/update-notifier/package-data-downloader fails permanently

[Karl-Philipp Richter]

`/usr/lib/update-notifier/package-data-downloader` of package `ttf-mscorefonts-installer` which is automatically invoked as additional data download after ever boot fails because of inexisting or obsolete download URLs. A manual invokation of `sudo /usr/lib/update-notifier/package-data-downloader` reveals

```
ttf-mscorefonts-installer: processing...
ttf-mscorefonts-installer: downloading http://downloads.sourceforge.net/corefonts/andale32.exe
Err:1 http://downloads.sourceforge.net/corefonts/andale32.exe
  Redirection from https to 'http://downloads.sourceforge.net/mirrorproblem?failedmirror=vorboss.dl.sourceforge.net' is forbidden
E: Failed to fetch https://vorboss.dl.sourceforge.net/project/corefonts/the fonts/final/andale32.exe Redirection from https to 'http://downloads.sourceforge.net/mirrorproblem?failedmirror=vorboss.dl.sourceforge.net' is forbidden
E: Download Failed
```

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: ttf-mscorefonts-installer 3.6ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-17.20-generic 4.13.8
Uname: Linux 4.13.0-17-generic x86_64
NonfreeKernelModules: nvidia zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.7-0ubuntu3.5
Architecture: amd64
CurrentDesktop: Unity:Unity7:ubuntu
Date: Tue Dec 5 01:31:22 2017
InstallationDate: Installed on 2015-12-12 (723 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: msttcorefonts
UpgradeStatus: Upgraded to artful on 2017-10-19 (46 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.