/usr/sbin/update-rt-siteconfig-3.8 is in request-tracker3.8 3.8.11-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | #!/bin/sh
# This script updates /etc/request-tracker3.8/RT_SiteConfig.pm
# with the contents of the /etc/request-tracker3.8/RT_SiteConfig.d/ 
# directory. The result is managed with ucf, so that no user
# changes are accidentally overwritten.
# Copyright 2007 Niko Tyni <ntyni@iki.fi>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.  You may also
# redistribute it and/or modify it under the terms of the Perl
# Artistic License.
CONFBASE="/etc/request-tracker3.8"
SITE_CONFIG_INCLUDE_DIR="$CONFBASE/RT_SiteConfig.d"
SITE_CONFIG="$CONFBASE/RT_SiteConfig.pm"
myname=$(basename $0)
tfile=$(mktemp -t "$myname".XXXXXXXX) || exit 1
cat <<EOF > $tfile
# This file was generated by running "$myname".
#
# While local modifications will not be overwritten without permission,
# it is recommended the they are instead placed in 
# $SITE_CONFIG_INCLUDE_DIR
#
# Note that modifications to the RT_SiteConfig.d directory won't 
# take effect until the update command mentioned above is run again.
EOF
# ignore *.ucf-old and the like
find "$SITE_CONFIG_INCLUDE_DIR" -type f \
    -regex "^$SITE_CONFIG_INCLUDE_DIR/[a-z0-9][a-z0-9-]+$" | sort | \
while read file 
do
    echo "# start $file" >> $tfile
    cat "$file" >> $tfile
    echo "# end   $file" >> $tfile
done
# the result is a Perl module, so it needs to return 1.
echo '1;' >> $tfile
if [ -f "$SITE_CONFIG" ]
then
    # try to honor the existing mode and owner of the file
    chown --reference "$SITE_CONFIG" $tfile
    chmod --reference "$SITE_CONFIG" $tfile
fi
ucf --sum-file /usr/share/request-tracker3.8/debian/RT_SiteConfig.pm.etch.md5sum \
    --debconf-ok $tfile "$SITE_CONFIG"
rm $tfile
 |