MBEDTLS_SSL_TLS1_3_TICKET_AGE_TOLERANCE macro

\def MBEDTLS_SSL_TLS1_3_TICKET_AGE_TOLERANCE Maximum time difference in milliseconds tolerated between the age of a ticket from the server and client point of view. From the client point of view, the age of a ticket is the time difference between the time when the client proposes to the server to use the ticket (time of writing of the Pre-Shared Key Extension including the ticket) and the time the client received the ticket from the server. From the server point of view, the age of a ticket is the time difference between the time when the server receives a proposition from the client to use the ticket and the time when the ticket was created by the server. The server age is expected to be always greater than the client one and MBEDTLS_SSL_TLS1_3_TICKET_AGE_TOLERANCE defines the maximum difference tolerated for the server to accept the ticket. This is not used in TLS 1.2.