MINOR: http: Add new "early-hint" http-request action.

This patch adds the new "early-hint" action to "http-request" rules parser.
This action should be parsed the same way as "(add|set)-header" actions.
diff --git a/include/types/action.h b/include/types/action.h
index 04a9f18..b24ce21 100644
--- a/include/types/action.h
+++ b/include/types/action.h
@@ -77,6 +77,7 @@
 	ACT_HTTP_DEL_ACL,
 	ACT_HTTP_DEL_MAP,
 	ACT_HTTP_SET_MAP,
+	ACT_HTTP_EARLY_HINT,
 
 	/* http request actions. */
 	ACT_HTTP_REQ_TARPIT,
diff --git a/src/http_rules.c b/src/http_rules.c
index ce67240..87117bf 100644
--- a/src/http_rules.c
+++ b/src/http_rules.c
@@ -208,8 +208,10 @@
 		else if ((rule->arg.loglevel = get_log_level(args[cur_arg]) + 1) == 0)
 			goto bad_log_level;
 		cur_arg++;
-	} else if (strcmp(args[0], "add-header") == 0 || strcmp(args[0], "set-header") == 0) {
-		rule->action = *args[0] == 'a' ? ACT_HTTP_ADD_HDR : ACT_HTTP_SET_HDR;
+	} else if (strcmp(args[0], "add-header") == 0 || strcmp(args[0], "set-header") == 0 ||
+	           strcmp(args[0], "early-hint") == 0) {
+		rule->action = *args[0] == 'a' ? ACT_HTTP_ADD_HDR :
+		               *args[0] == 's' ? ACT_HTTP_SET_HDR : ACT_HTTP_EARLY_HINT;
 		cur_arg = 1;
 
 		if (!*args[cur_arg] || !*args[cur_arg+1] ||