/etc/cron.daily/spamassassin - Update failed, exiting with code 4

[Bill Keenan]

Googling this turns up some speculation…are the 4 curls failing because of a 
mirror problem? Shame on me for not watching…I do not know when this error 
started to occur. If there is a fix, where is it documented?

Bill

SpamAssassin version 3.4.1
  running on Perl version 5.20.2

# Update
umask 022
env -i LANG="$LANG" PATH="$PATH" start-stop-daemon \
    --chuid debian-spamd:debian-spamd --start \
    --exec /usr/bin/sa-update -- -v \
    --gpghomedir /var/lib/spamassassin/sa-update-keys 2>&1
Update available for channel updates.spamassassin.org: 1742071 -> 1743481
http: (curl) GET http://sa-update.secnap.net/1743481.tar.gz, FAILED, status: 
exit 23
http: (curl) GET http://www.sa-update.pccc.com/1743481.tar.gz, FAILED, status: 
exit 23
http: (curl) GET http://sa-update.space-pro.be/1743481.tar.gz, FAILED, status: 
exit 23
http: (curl) GET http://sa-update.dnswl.org/1743481.tar.gz, FAILED, status: 
exit 23
channel: could not find working mirror, channel failed
Update failed, exiting with code 4