Bug#47417: apt: apt-get ftp should retry if USER fails

[Zack Weinberg <zack@bitmover.com>]

Package: apt
Version: 0.3.13
Severity: wishlist

If apt-get attempts to connect to an FTP server and is rejected at the
USER request, this is usually because the server is throttling connections.
It should sleep for a short, tunable interval (5-30sec) and retry the same
download.  Instead it immediately proceeds to the next file on its list.

Also, I am not certain, but it appears that apt-get reconnects to the FTP
server for every file transfer.  It'd be nice if it would cache the control
connection.

zw

-- System Information
Debian Release: potato
Kernel Version: Linux zack 2.2.13pre15 #1 Mon Oct 4 22:12:49 PDT 1999 i686 unknown

Versions of the packages apt depends on:
ii  libc6           2.1.2-5        GNU C Library: Shared libraries and timezone
ii  libstdc++2.10   2.95.2-0pre2   The GNU stdc++ library