disparate duplicate subproto handling in protover
Link=1 Link=1 and
Link=1 identically, allowing duplicate entries without complaint, though it does explicitly check for duplicates to avoid double-counting it as two votes for the same version.
protover.c also treats
Link=1 Link=2 and
Link=1-2 the same, while the rust implementation of protover treats
Link=1 Link=2 as if it were