Const correctness for toxcore/Messenger.c and related files
Const-correctness for toxcore/net_crypto.c
Const-correctness for toxcore/onion_announce.c
Const-correctness for onion.c
Const-correctness for onion_client.c
Const-correctness for TCP_client.c
Const-correctness for TCP_server.c
Const-correctness for tox.c
Merge branch 'const_correctness' of https://github.com/schuetzm/ProjectTox-Core
Fixed const related warnings.