[master] f60995b8b Improve http1_iovs_flush documentation

[Nils Goroll]

commit f60995b8bedf9bdd0f99c2c3c3b7738cf4798fe2
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon May 8 16:36:12 2023 +0200

    Improve http1_iovs_flush documentation

diff --git a/lib/libvsc/VSC_main.vsc b/lib/libvsc/VSC_main.vsc
index 2500a0260..46655ca72 100644
--- a/lib/libvsc/VSC_main.vsc
+++ b/lib/libvsc/VSC_main.vsc
@@ -946,4 +946,11 @@
 .. varnish_vsc:: http1_iovs_flush
 	:oneliner:	Premature iovec flushes
 
+	Number of additional writes performed on HTTP1 connections
+	because the number of IO vectors was too small to submit all
+	possible IO in one go. This number is configured through the
+	``http1_iovs`` parameter for client connections and implicitly
+	defined by the amount of free workspace for backend
+	connections.
+
 .. varnish_vsc_end::	main