Aliases for abbreviations.md

[couleurm]

Instead of doing

*[FOSS]: Free and Open Source Software: Something that is free as in price and freedom, with publicly avalaible and modifiable source code.
*[free and open source software]: Free and Open Source Software: Something that is free as in price and freedom, with publicly avalaible and modifiable source code.

be able to simply

*[FOSS|free and open source software]: Free and Open Source Software: Something that is free as in price and freedom, with publicly avalaible and modifiable source code.

[kamilkrzyskow]

@couleurm Same answer as in

• feature request: Allow regex in abbreviations #6706

please don't basically repeat ideas in different discussions. I'll lock this and anyone can follow-up in the previous discussion.