Come up with sillier names for the binaries

I'm not entirely sure, but it looks like some people might not like
jokes about the Holocaust.

On a more serious note, the project has become more serious over
the 7 or so years of its existence.

plugins/xB/seen-import-xC.pl

@@ -0,0 +1,39 @@
+#!/usr/bin/env perl
+# Creates a database for the "seen" plugin from logs for xC.
+# The results may not be completely accurate but are good for jumpstarting.
+# Usage: ./seen-import-xC.pl LOG-FILE... > seen.db
+
+use strict;
+use warnings;
+use File::Basename;
+use Time::Piece;
+
+my $db = {};
+for (@ARGV) {
+	my $where = (basename($_) =~ /\.(.*).log/)[0];
+	unless ($where) {
+		print STDERR "Invalid filename: $_\n";
+		next;
+	}
+
+	open my $fh, '<', $_ or die "Failed to open log file: $!";
+	while (<$fh>) {
+		my ($when, $who, $who_action, $what) =
+			/^(.{19}) (?:<[~&@%+]*(.*?)>| \*  (\S+)) (.*)/;
+		next unless $when;
+
+		if ($who_action) {
+			$who = $who_action;
+			$what = "* $what";
+		}
+		$db->{$who}->{$where} =
+			[Time::Piece->strptime($when, "%Y-%m-%d %T")->epoch, $what];
+	}
+}
+
+while (my ($who, $places) = each %$db) {
+	while (my ($where, $data) = each %$places) {
+		my ($when, $what) = @$data;
+		print ":$who PRIVMSG $where $when :$what\n";
+	}
+}