Upgrade curl to curl-7_73_0

Test: make
Change-Id: Ib063c45f52a3c6892447f92e44043a14f01a917a
diff --git a/docs/cmdline-opts/sasl-ir.d b/docs/cmdline-opts/sasl-ir.d
index c0dab94..0041c3b 100644
--- a/docs/cmdline-opts/sasl-ir.d
+++ b/docs/cmdline-opts/sasl-ir.d
@@ -1,5 +1,6 @@
 Long: sasl-ir
 Help: Enable initial response in SASL authentication
 Added: 7.31.0
+Category: auth
 ---
 Enable initial response in SASL authentication.