MINOR: doc: Add information about "early-hint" http-request action.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 52cc432..349dfab 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -4130,6 +4130,16 @@
those that can be overridden by the "errorfile" directive.
No further "http-request" rules are evaluated.
+http-request early-hint <name> <fmt> [ { if | unless } <condition> ]
+
+ This is used to build an HTTP 103 Early Hints response prior to any other one.
+ This appends an HTTP header field to this response whose name is specified in
+ <name> and whose value is defined by <fmt> which follows the log-format rules
+ (see Custom Log Format in section 8.2.4). This is particularly useful to pass
+ to the client som
+
+ See RFC 8297 for more information.
+
http-request redirect <rule> [ { if | unless } <condition> ]
This performs an HTTP redirection based on a redirect rule. This is exactly