Fix next index in retry connect_one

[belltoy]

The list in Erlang is 1-based index, but the rem operator is 0-based. If we want to wrap around the next index of the list via rem operator, we need to turn it back to 0-based. Or else the next index will skip the next one (step 2).

So the next index will be:

%% ZeroBasedIndex = Index - 1,
%% NextZeroBasedIndex = (ZeroBasedIndex + 1 rem Len),
%% NextIndex = NextZeroBasedIndex + 1,

%% NewIndex = (Index -1 + 1) rem Len + 1,
NewIndex = Index rem Len + 1,

[zhongwencool]

Good Catch!