add roudeneck

...any better explanation of the L other than it looks like an eck?

external/general/glossary/glossary.md

@@ -19,6 +19,7 @@ Are you sometimes confused with all the abbreviations and names in and around th
 |AsperaWeb|-|Software for end-to-end encrypted data transfer at the LCSB|
 |Atlas|-|Server of the LCSB|
 |BT1 & BT2|House of Biomedicine/Biotech 1&2|Indication of the different buildings of the LCSB|
+|BTL|House of Biomedicine/Biotech L |Indication of a building of the LCSB ("Roudeneck", the same building as Aldi)|
 |CFL|Chemins de Fer Luxembourgeois|Operator for public transport (train, bus) in Luxembourg|
 |CHL|Centre Hospitalier de Luxembourg|Central Hospital in Luxembourg city – also collaborating with the LCSB|
 |CNER|Comité National d’Ethique de Recherche|National committee for ethical approval or research projects|