I blew it:
garbage=`rm -f procmaillog-`date -d '4 months ago' +"%Y%m"`
Jacques noticed:
| I count three backticks here?
Oops. Vous avez raison, Jacques. Thank you. Since procmail can't nest
command substitutions, that wouldn't work. Jacques's correction would:
| olddate=`date -d '4 months ago' +%Y%m`
| garbage=`rm -f procmaillog-$olddate`
or
:0ic
garbage=| rm -f procmaillog-`date -d '4 months ago' +"%Y%m"`
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