- also change how speakers are saved/retrieved from the db
- add generic authorization methods in outputs.c and player.c
- let filescanner read *.verification files (containing PIN)
- configure options to enable and disable, since libsodium is required
Only a cosmetic change to avoid future confusion. sqlite3 ignores the
number of chars given to VARCHAR (see https://sqlite.org/faq.html#q9 ),
a db upgrade is therefor not necessary.
