Fix typo in tutorial (#225)

Release 2.27.0

- [API] Remove keylog callbacks. See issue #188.
- Add a bit more ALPN logging.

Release 2.26.0

- [OPTIMIZATION] Adjust packet reordering threshold when spurious losses
are detected.
- [API] Pass pointer to local sockaddr to ea_get_ssl_ctx() callback.

Add links to tutorial and NetDev presentation

Keep ea_get_ssl_ctx() optional for the client

Support get_ssl_ctx callback for client

Fix tutorial deficiencies pointed out to me by @lslisa (#146)

Finish LSQUIC Tutorial

Release 2.18.0

- [API] Rename "0-RTT" to "session resumption." In IETF QUIC, "0-RTT"
always refers to early data, meaning a request that the server can
reply to in the very first return flight. A more appropriate name
for what we support on the client site is "session resumption," which
is standard TLS terminology. Later, when we add support for 0-RTT
(early data), we can use the 0-RTT terminology again, this time in
proper context.
- [BUGFIX] Do not set certificate callback if ea_lookup_cert is NULL.
- [BUGFIX] Make connection tickable when it's marked as closed.
- [BUGFIX] Fail certificate lookup if SNI is not present in HTTP mode.
- Several documentation fixes and improvements.
- Minor code cleanup.

Add tutorial.rst -- forgotten in the previous commit