fix: certificate verification only check validity dates now

feat: function to update certificates on existing transports

fix: tport is not closed after inactivity when it never received data

fix: prevent msg buffer allocation with more than agent's sa_maxsize bytes

[nth] add nth_site_get_first_port to nth server api

Increase required CMake version.

Add callbacks to notify transaction deletion

Added su_port_delete_msgs in su_root_destroy.

Prefer routing messages through connected tport rather than tport in connecting state.

Remove tport queue size max size limit

Add TPTAG_TLS_SNI() tag

Fix PONG waiting code

Revert "Use monotonic clock to manage sofia timer instead of system one"

Use monotonic clock to manage sofia timer instead of system one

Remove files from library that must be found on system