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+@dir /lib/tls
+@brief lib/tls: TLS library wrappers
+
+This module has compatibility wrappers around the library (NSS or OpenSSL,
+depending on configuration) that Tor uses to implement the TLS link security
+protocol.
+
+It also implements the logic for some legacy TLS protocol usage we used to
+support in old versions of Tor, involving conditional delivery of certificate
+chains (v1 link protocol) and conditional renegotiation (v2 link protocol).
+