fix(server): Add max retransmissionqueue per subscription
fix(server): Add max retransmissionqueue per subscription

This lets a remove problematic STACKARRAY (vla/alloca) that might have
length zero. And fuzzing doesn't like that.

jpfr/open62541,StalderT/open62541,jpfr/open62541,open62541/open62541,open62541/open62541,jpfr/open62541,StalderT/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541,JGrothoff/open62541,open62541/open62541,StalderT/open62541,JGrothoff/open62541,JGrothoff/open62541,open62541/open62541