SOLVABLE_MEDIADIR
repodata_set_void(data, solvid, SOLVABLE_MEDIADIR);
repodata_set_strn(data, solvid, SOLVABLE_MEDIADIR, dir, l);
if (solvable_lookup_void(s, SOLVABLE_MEDIADIR))
mediadir = solvable_lookup_str(s, SOLVABLE_MEDIADIR);