HRV: misc issues

[Duke87]

D8: the Zen point in Senj needs to be realigned to the nearby roundabout (and renamed?).
D8: would like to request a point at Z59001 in Senj - had to detour just south of here due to a construction closure.
D23: A1(9) point needs to be relabeled A1(10)
A1: is there a reason some exit number labels have an "a" suffix with no corresponding b or vanilla?

[michih]

https://github.com/TravelMapping/HighwayData/pull/7275

A1: is there a reason some exit number labels have an "a" suffix with no corresponding b or vanilla?

The vanilla exit number labels are in-use alt labels.