there are other things, i checked the whole archive again:
* config/ident.cfg: NAME, COMMENT, (DOMAIN_USER, DOMAIN_PASSWORD (cannot test that it's empty on our servers), WORKGROUP (maybe if its not "WORKGROUP"), LOCAL_TLD
* config/listen.txt: br0 and tun0 ip ranges / ips
* config/rsyslog.cfg: remote_server
* config/rsyslog.conf: at least the ip of the remote_server (*.* @1.2.3.4:514;RSYSLOG_SyslogProtocol23Format)
* config/super.dat: disk serial numbers
* config/pool/cache.cfg: diskId, diskId.1 (seem to contain disk serials)
* logs/dhcp.log: IPs and routes
* logs/libvirt: hostname
* logs/syslog*.txt: hostname, ips, ssh users (successful and failed logins), docker container names, file names (mover)
* qemu/*.txt: filename is VM name, hostname, HOME, XDG_*_HOME, master-key file name, image names (block dev)
* smart/*.txt: filename contains disk serials, Serial Number, LU WWN Device Id (for Crucial CT2000MX500 contains part of the serial number),
* system/ifconfig.txt: ip addresses and mac addresses (at least strip the last 3 segments so only the manifacturer part is visible)
* system/lsof.txt: ip addresses, user names (all non default unraid users)
* system/meminfo.txt: RAM serial numbers
* system/ps.txt: user names (all non default unraid users), command arguments, program locations
* system/testparm.txt: interfaces, server string, read list ("valid users" and "write list" are already replace with {a}...{z})
* system/top.txt: user names (all non default unraid users), not sure about COMMAND (did contain nothing secret in our example but might in others)
* system/urls.txt: Server Name, Local TLD, Internal IP, DNS 1, HTTP IP url, HTTP URL, HTTPS url 1, and errors (ERROR: When using DNS server 1.2.3.4, unredacted.fully.qualified.domain.name resolves to [redacted]. It should resolve to 1.2.3.5), cert names also show host name (and old host names possibly (Tower_unraid_bundle.pem))
* system/vars.txt: DISK ID shows serial, idSb shows serial, DNS_SERVER1, IPADDR:0, GATEWAY:0, NGINX_LANIP, NGINX_LANNAME, NGINX_LANMDNS, ID_SERIAL (dotted for USB but not for disks), ID_SERIAL_SHORT (dotted for USB but not for disks), ID_WWN (for Crucial), ID_WWN_WITH_EXTENSION (for Crucial), NAME, COMMENT, WORKGROUP (if not "WORKGROUP"), LOCAL_TLD
* xml/*.xml: filename is VM name, name, mac addresses of network interfaces, vnc listen if not 0.0.0.0, filesystem mount file names