Describe the bug
CServerRpc and CClientRpc/CServerRpc are created with "new" in main.cpp, but are never deleted.

To Reproduce
Run Jamulus with and without valid --jsonrpcport and --jsonrpcsecretfile parameters.
Use Visual studio's memory usage diagnostic tool to check the difference in memory usage at exit.

Expected behavior
Cleanup on exit.

Screenshots

Operating system
n.a.

Version of Jamulus
master @ 953f2b8

Additional context