2023: Fix the URL IDs

Python's lstrip() method takes a **set** of characters to be removed
from the left side of the sting and therefore unsuitable for removing
prefixes. The documentation even explicitly mentions this [0]:
> The chars argument is not a prefix; rather, all combinations of its
> values are stripped
> See str.removeprefix() for a method that will remove a single prefix
> string rather than all of a set of characters.

Oh well...

Unfortunately, we repaired this way too late so we should definitely not
break the old links. Therefore, I came up with this quick and dirty
approach... (a better solution would be to generate redirects but that
can also be done later).

We also need to generate better URL IDs in the future as the new ones
are still problematic (especially due to the missing umlauts). I added a
note to convert_from_pretalx.py for a potential solution that gives us
the most flexibility (since the talk IDs from Pretalx are definitely
stable).
Anyway, let's use this quick fix for now.

[0]: https://docs.python.org/3.11/library/stdtypes.html#str.lstrip

2023/programm2.md

@@ -19,17 +19,17 @@ Alternativ kann das Program auch über pretalx angesehen werden: [cfp.tuebix.org
 <table>
 <tr><td></td><td></td><td></td><td></td><td>Raum W1</td></tr>
 <tr><td>10:00</td><td>bis</td><td>11:50</td><td><a class="work"></a></td><td><a href="../programm/5-git-annex-dateien-synchronisieren-sichern-und-verwalten-fr-poweruser">Git&nbsp;Annex:&nbsp;Dateien&nbsp;synchronisieren,&nbsp;sichern&nbsp;und&nbsp;verwalten&nbsp;für&nbsp;Poweruser</a></td><td>Yann&nbsp;Büchau</td></tr>
-<tr><td>12:00</td><td>bis</td><td>13:50</td><td><a class="work"></a></td><td><a href="../programm/latex-fr-einsteiger">LaTeX&nbsp;für&nbsp;Einsteiger</a></td><td>Philipp&nbsp;Kammerer</td></tr>
+<tr><td>12:00</td><td>bis</td><td>13:50</td><td><a class="work"></a></td><td><a href="../programm/20-latex-fr-einsteiger">LaTeX&nbsp;für&nbsp;Einsteiger</a></td><td>Philipp&nbsp;Kammerer</td></tr>
 <tr><td>14:00</td><td>bis</td><td>15:50</td><td><a class="work"></a></td><td><a href="../programm/48-same-procedure-as-every-year-kommandozeilen-sprechstunde-n-">Same&nbsp;Procedure&nbsp;as&nbsp;Every&nbsp;Year:&nbsp;Kommandozeilen-Sprechstunde(n)</a></td><td>Harald&nbsp;König</td></tr>
 <tr><td>&nbsp;</td></tr>
 <tr><td></td><td></td><td></td><td></td><td>Raum V1</td></tr>
 <tr><td>09:30</td><td>bis</td><td>09:50</td><td><a class="talk2"></a></td><td><a href="../programm/tuebix-init">Tübix&nbsp;Init</a></td><td>Tübix&nbsp;Orga&nbsp;Team</td></tr>
-<tr><td>10:00</td><td>bis</td><td>10:50</td><td><a class="talk"></a></td><td><a href="../programm/8-einstieg-in-linux-kernel-debugging">Einstieg&nbsp;in&nbsp;Linux&nbsp;Kernel&nbsp;Debugging</a></td><td>Stefan&nbsp;Walter</td></tr>
+<tr><td>10:00</td><td>bis</td><td>10:50</td><td><a class="talk"></a></td><td><a href="../programm/38-einstieg-in-linux-kernel-debugging">Einstieg&nbsp;in&nbsp;Linux&nbsp;Kernel&nbsp;Debugging</a></td><td>Stefan&nbsp;Walter</td></tr>
 <tr><td>11:00</td><td>bis</td><td>11:50</td><td><a class="talk"></a></td><td><a href="../programm/58-die-wirre-welt-der-kleinen-computer">Die&nbsp;wirre&nbsp;Welt&nbsp;der&nbsp;kleinen&nbsp;Computer</a></td><td>Daniel&nbsp;Maslowski</td></tr>
-<tr><td>12:00</td><td>bis</td><td>12:50</td><td><a class="talk"></a></td><td><a href="../programm/ldungssysteme-nachhaltig-digitalisieren">Bildungssysteme&nbsp;nachhaltig&nbsp;digitalisieren</a></td><td>Frank&nbsp;Schiebel&nbsp;&&nbsp;Andreas&nbsp;Grupp&nbsp;&&nbsp;Andi&nbsp;Mundt</td></tr>
+<tr><td>12:00</td><td>bis</td><td>12:50</td><td><a class="talk"></a></td><td><a href="../programm/23-bildungssysteme-nachhaltig-digitalisieren">Bildungssysteme&nbsp;nachhaltig&nbsp;digitalisieren</a></td><td>Frank&nbsp;Schiebel&nbsp;&&nbsp;Andreas&nbsp;Grupp&nbsp;&&nbsp;Andi&nbsp;Mundt</td></tr>
 <tr><td>14:00</td><td>bis</td><td>14:50</td><td><a class="talk"></a></td><td><a href="../programm/43-so-vermittelst-du-technische-inhalte-verstndlich">So&nbsp;vermittelst&nbsp;du&nbsp;technische&nbsp;Inhalte&nbsp;verständlich</a></td><td>Frank&nbsp;Hofmann</td></tr>
-<tr><td>15:00</td><td>bis</td><td>15:50</td><td><a class="talk"></a></td><td><a href="../programm/hacking-von-sicheren-usb-sticks-und-usb-festplatten">Hacking&nbsp;von&nbsp;sicheren&nbsp;USB-Sticks&nbsp;und&nbsp;USB-Festplatten</a></td><td>Gerhard&nbsp;Klostermeier</td></tr>
-<tr><td>16:00</td><td>bis</td><td>16:50</td><td><a class="talk"></a></td><td><a href="../programm/1-typische-schwachstellen-von-heimnetz-routern">Typische&nbsp;Schwachstellen&nbsp;von&nbsp;Heimnetz-Routern</a></td><td>Gerhard&nbsp;Klostermeier</td></tr>
+<tr><td>15:00</td><td>bis</td><td>15:50</td><td><a class="talk"></a></td><td><a href="../programm/32-hacking-von-sicheren-usb-sticks-und-usb-festplatten">Hacking&nbsp;von&nbsp;sicheren&nbsp;USB-Sticks&nbsp;und&nbsp;USB-Festplatten</a></td><td>Gerhard&nbsp;Klostermeier</td></tr>
+<tr><td>16:00</td><td>bis</td><td>16:50</td><td><a class="talk"></a></td><td><a href="../programm/31-typische-schwachstellen-von-heimnetz-routern">Typische&nbsp;Schwachstellen&nbsp;von&nbsp;Heimnetz-Routern</a></td><td>Gerhard&nbsp;Klostermeier</td></tr>
 <tr><td>18:00</td><td>bis</td><td>18:20</td><td><a class="talk2"></a></td><td><a href="../programm/tuebix-exit">Tübix&nbsp;Exit</a></td><td>Tübix&nbsp;Orga&nbsp;Team</td></tr>
 <tr><td>18:30</td><td>bis</td><td>18:50</td><td><a class="talk"></a></td><td><a href="../programm/41-open-source-ist-fr-viele-informatik-studierende-ein-mysterium">Open&nbsp;Source&nbsp;ist&nbsp;für&nbsp;viele&nbsp;Informatik-Studierende&nbsp;ein&nbsp;Mysterium</a></td><td>Daniel&nbsp;Kulesz</td></tr>
 <tr><td>&nbsp;</td></tr>
@@ -41,17 +41,17 @@ Alternativ kann das Program auch über pretalx angesehen werden: [cfp.tuebix.org
 <tr><td>15:00</td><td>bis</td><td>15:20</td><td><a class="talk"></a></td><td><a href="../programm/42-docker-build-alternativen">Docker&nbsp;build&nbsp;Alternativen</a></td><td>Gabriel&nbsp;Wustmann</td></tr>
 <tr><td>15:30</td><td>bis</td><td>15:50</td><td><a class="talk"></a></td><td><a href="../programm/56-identity-management-mit-keycloak">Identity&nbsp;Management&nbsp;mit&nbsp;Keycloak</a></td><td>Roland&nbsp;Alton-Scheidl&nbsp;&&nbsp;Jonas&nbsp;Liebst</td></tr>
 <tr><td>16:00</td><td>bis</td><td>16:50</td><td><a class="talk"></a></td><td><a href="../programm/53-ordnung-im-chaos-finden-microservices-observability">Ordnung&nbsp;im&nbsp;Chaos&nbsp;finden:&nbsp;Microservices&nbsp;Observability</a></td><td>Finn&nbsp;Rayk&nbsp;Gärtner</td></tr>
-<tr><td>17:00</td><td>bis</td><td>17:20</td><td><a class="talk"></a></td><td><a href="../programm/6-embeded-mastodon-datenschutzfreundliches-marketing-arbeiten-an-fderierten-gitea-forgejo">Embeded&nbsp;Mastodon&nbsp;-&nbsp;Datenschutzfreundliches&nbsp;Marketing&nbsp;&&nbsp;arbeiten&nbsp;an&nbsp;föderierten&nbsp;gitea/forgejo</a></td><td>Michael&nbsp;Jerger</td></tr>
-<tr><td>17:30</td><td>bis</td><td>17:40</td><td><a class="talk"></a></td><td><a href="../programm/7-lightningc4k">LightningC4k</a></td><td>Michael&nbsp;Jerger</td></tr>
+<tr><td>17:00</td><td>bis</td><td>17:20</td><td><a class="talk"></a></td><td><a href="../programm/36-embeded-mastodon-datenschutzfreundliches-marketing-arbeiten-an-fderierten-gitea-forgejo">Embeded&nbsp;Mastodon&nbsp;-&nbsp;Datenschutzfreundliches&nbsp;Marketing&nbsp;&&nbsp;arbeiten&nbsp;an&nbsp;föderierten&nbsp;gitea/forgejo</a></td><td>Michael&nbsp;Jerger</td></tr>
+<tr><td>17:30</td><td>bis</td><td>17:40</td><td><a class="talk"></a></td><td><a href="../programm/37-lightningc4k">LightningC4k</a></td><td>Michael&nbsp;Jerger</td></tr>
 <tr><td>&nbsp;</td></tr>
 <tr><td></td><td></td><td></td><td></td><td>Raum V3</td></tr>
 <tr><td>10:00</td><td>bis</td><td>10:50</td><td><a class="talk"></a></td><td><a href="../programm/13-howto-mein-erstes-paket-im-arch-user-repository">Howto:&nbsp;Mein&nbsp;erstes&nbsp;Paket&nbsp;im&nbsp;Arch&nbsp;User&nbsp;Repository</a></td><td>Christian&nbsp;Heusel</td></tr>
 <tr><td>11:00</td><td>bis</td><td>11:50</td><td><a class="talk"></a></td><td><a href="../programm/6-ein-freies-schulnetz-">Ein&nbsp;freies&nbsp;Schulnetz!</a></td><td>Frank&nbsp;Schiebel</td></tr>
-<tr><td>12:00</td><td>bis</td><td>12:50</td><td><a class="talk"></a></td><td><a href="../programm/4-kamerawagen-fr-h0-modelleisenbahn-mit-linux">Kamerawagen&nbsp;für&nbsp;H0-Modelleisenbahn&nbsp;mit&nbsp;Linux</a></td><td>Roland&nbsp;Imme</td></tr>
+<tr><td>12:00</td><td>bis</td><td>12:50</td><td><a class="talk"></a></td><td><a href="../programm/34-kamerawagen-fr-h0-modelleisenbahn-mit-linux">Kamerawagen&nbsp;für&nbsp;H0-Modelleisenbahn&nbsp;mit&nbsp;Linux</a></td><td>Roland&nbsp;Imme</td></tr>
 <tr><td>13:00</td><td>bis</td><td>13:50</td><td><a class="talk"></a></td><td><a href="../programm/14-picodoom-a-fork-of-gba-doom">PicoDoom,&nbsp;a&nbsp;fork&nbsp;of&nbsp;GBA&nbsp;Doom</a></td><td>Olaf&nbsp;Flebbe</td></tr>
 <tr><td>14:00</td><td>bis</td><td>14:20</td><td><a class="talk"></a></td><td><a href="../programm/57-platzsparend-automatisierung-testen">Platzsparend&nbsp;Automatisierung&nbsp;testen</a></td><td>André&nbsp;Niemann</td></tr>
-<tr><td>14:30</td><td>bis</td><td>14:50</td><td><a class="talk"></a></td><td><a href="../programm/hacking-eines-funkthermostats">Hacking&nbsp;eines&nbsp;Funkthermostats</a></td><td>Gerhard&nbsp;Klostermeier</td></tr>
-<tr><td>15:00</td><td>bis</td><td>15:20</td><td><a class="talk"></a></td><td><a href="../programm/9-vom-leben-und-sterben-einer-software">Vom&nbsp;Leben&nbsp;und&nbsp;Sterben&nbsp;einer&nbsp;Software</a></td><td>Lukas&nbsp;Kallies</td></tr>
+<tr><td>14:30</td><td>bis</td><td>14:50</td><td><a class="talk"></a></td><td><a href="../programm/33-hacking-eines-funkthermostats">Hacking&nbsp;eines&nbsp;Funkthermostats</a></td><td>Gerhard&nbsp;Klostermeier</td></tr>
+<tr><td>15:00</td><td>bis</td><td>15:20</td><td><a class="talk"></a></td><td><a href="../programm/39-vom-leben-und-sterben-einer-software">Vom&nbsp;Leben&nbsp;und&nbsp;Sterben&nbsp;einer&nbsp;Software</a></td><td>Lukas&nbsp;Kallies</td></tr>
 <tr><td>15:30</td><td>bis</td><td>15:35</td><td><a class="light"></a></td><td><a href="../programm/102-vorstellung-fablab">Vorstellung&nbsp;Fablab</a></td><td>Paul&nbsp;Rosset</td></tr>
 <tr><td>15:35</td><td>bis</td><td>15:40</td><td><a class="light"></a></td><td><a href="../programm/16-plaintextaccounting-mit-hledger">PlainTextAccounting&nbsp;mit&nbsp;hledger</a></td><td>Yann&nbsp;Büchau</td></tr>
 <tr><td>15:40</td><td>bis</td><td>15:45</td><td><a class="light"></a></td><td><a href="../programm/47-das-grannophone-ein-videotelefon-fr-senioren-und-demenzpatienten">Das&nbsp;Grannophone&nbsp;-&nbsp;ein&nbsp;Videotelefon&nbsp;für&nbsp;Senioren&nbsp;und&nbsp;Demenzpatienten</a></td><td>Stefan&nbsp;Baur</td></tr>