Given that women replace shelo asani isha with she'asani kirtzono, is there any halacha on what a Jewish slave would say for shelo asani eved? Also, would a slave need to be need to be acquired & held according to halacha to be considered eved, or would a Jew forced into slavery by gentiles be considered eved for the purposes of halacha?
(In case you're wondering, this came up during a conversation about forced labor in concentration camps during the Holocaust.)