11.5 Connection information when using TCP Fast Open
11.6 slow connect to localhost on Windows
11.7 signal-based resolver timeouts
+ 11.8 DoH leaks memory after followlocation
12. LDAP and OpenLDAP
12.1 OpenLDAP hangs after returning results
Also, alarm() provides timeout resolution only to the nearest second. alarm
ought to be replaced by setitimer on systems that support it.
+11.8 DoH leaks memory after followlocation
+
+ https://github.com/curl/curl/issues/4592
12. LDAP and OpenLDAP