write-out.d: clarify size_download/upload

They show the number of "body" bytes transfered.
Fixes #7702
Closes #7706

diff --git a/docs/cmdline-opts/write-out.d b/docs/cmdline-opts/write-out.d
index 6c74ddcdc4df8b747cb63c46c6959829e99ebfc6..6168059786e0b2c71baf2dd2e2cd9173ae6498e5 100644 (file)
--- a/docs/cmdline-opts/write-out.d
+++ b/docs/cmdline-opts/write-out.d
@@ -112,7 +112,8 @@ known as "http_code"). (Added in 7.18.2)
 The URL scheme (sometimes called protocol) that was effectively used. (Added in 7.52.0)
 .TP
 .B size_download
-The total amount of bytes that were downloaded.
+The total amount of bytes that were downloaded. This is the size of the
+body/data that was transfered, excluding headers.
 .TP
 .B size_header
 The total amount of bytes of the downloaded headers.
@@ -121,7 +122,8 @@ The total amount of bytes of the downloaded headers.
 The total amount of bytes that were sent in the HTTP request.
 .TP
 .B size_upload
-The total amount of bytes that were uploaded.
+The total amount of bytes that were uploaded. This is the size of the
+body/data that was transfered, excluding headers.
 .TP
 .B speed_download
 The average download speed that curl measured for the complete download. Bytes