modules/system-info: Add last missing port information

The current system-info is thus now:
```
  # server2

  ## Virtual Hosts

  atuin-sync.vhack.eu
  etebase.vhack.eu: dav.vhack.eu
  gallery.s-schoeffel.de
  git.foss-syndicate.org
  invidious-router.vhack.eu: video.fosswelt.org invidious-router.sils.li
  issues.foss-syndicate.org
  nextcloud.vhack.eu
  redlib.vhack.eu
  sharkey.vhack.eu
  source.foss-syndicate.org
  source.vhack.eu
  taskchampion.vhack.eu

  ## Open ports

  TCP 22: ssh
  TCP 25: mail-smtp
  TCP 53: dns
  TCP 80: http
  TCP 443: https
  TCP 465: mail-smtp-tls
  TCP 993: mail-imap-tls
  TCP 995: mail-pop3-tls

  UDP 53: dns

  # server3

  ## Virtual Hosts

  b-peetz.de
  mastodon.vhack.eu
  matrix.vhack.eu
  miniflux.foss-syndicate.org: rss.foss-syndicate.org rss.vhack.eu miniflux.vhack.eu
  openpgpkey.b-peetz.de
  openpgpkey.s-schoeffel.de
  openpgpkey.sils.li
  openpgpkey.vhack.eu
  peertube.vhack.eu
  rocie.vhack.eu
  trinitrix.vhack.eu
  vhack.eu

  ## Open ports

  TCP 22: ssh
  TCP 53: dns
  TCP 80: http
  TCP 443: https
  TCP 64738: murmur

  UDP 53: dns
  UDP 64738: murmur
```

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