People are reporting that under some circumstances, an infinite
loop could happen when TLSharp tries to handle a reconnection to
a different DC, if the DC instructed to be used is the same as
the one that was used in the last connection.
Not sure how could this happen (although the analysis present in
this github issue [1] might help understand it), but this commit
helps to make TLSharp fail fast (with an exception) instead of an
infinite loop from now on, which will help avoiding people file
issues such as [2] and [3] and instead maybe file a proper bug
report easier to understand, to try to fix the underlying root
cause.
[1] https://github.com/sochix/TLSharp/issues/719
[2] https://github.com/sochix/TLSharp/issues/803
[3] https://github.com/sochix/TLSharp/issues/839
