Bug#221664: apt-get source: Handle failed source downloads more gracefully

[Mark Brown <broonie@sirena.org.uk>]

Package: apt
Version: 0.5.14
Severity: normal

When downloading a binary package fails and there is another download
site for that package apt-get will fall over to using that other site.
With source packages apt-get appears to fail hard on the first site.  It
would be nice if this could be handled in the same way as it is for
binary packages.

-- System Information:
Debian Release: testing/unstable
Architecture: powerpc
Kernel: Linux damiel 2.4.21-powerpc #1 mar jui 8 19:36:37 CEST 2003 ppc
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8

Versions of packages apt depends on:
ii  libc6                       2.3.2.ds1-10 GNU C Library: Shared libraries an
ii  libgcc1                     1:3.3.2-4    GCC support library
ii  libstdc++5                  1:3.3.2-4    The GNU Standard C++ Library v3

-- no debconf information