I live in the USA and the federal constitution here forbids slavery with the exception of those being punished for a crime. There are thousands of people in jail who cannot afford the bail money to get out of jail and hire proper counsel for their defense in criminal court. The result is that they admit to crimes they may have not committed and end up doing involuntary servitude for years in prison.
I know this type of slavery during incarceration is a far cry from the slavery in our prophets time. I don't think they had prisons back then. I tried to find the sura in the Quran regarding the ways for a muslim to make up for missed days of fasting but couldn't find one, so these must be in hadith.
Although I never missed days of fasting for some years now, in my youth I was sloppy in this regard. Can payments to free people from jail or prison whether in the form of bail-bond or hiring proper criminal attorney be counted as 'freeing a slave', particularly for making up for missed days of fasting? Please cite Hadith.