verbose.md: mention how carriage-return might occur in headers

Fixes #16285
Reported-by: Andrei Korshikov
Closes #16286

diff --git a/docs/cmdline-opts/verbose.md b/docs/cmdline-opts/verbose.md
index d29e23a7bb02a3fe6c03254bb887c7986f5b33e1..21065f7169f040d5056d0a044abddeb9b7c9f335 100644 (file)
--- a/docs/cmdline-opts/verbose.md
+++ b/docs/cmdline-opts/verbose.md
@@ -53,3 +53,8 @@ to trace the specific components you wish to see.
 Note that verbose output of curl activities and network traffic might contain
 sensitive data, including usernames, credentials or secret data content. Be
 aware and be careful when sharing trace logs with others.
+
+When the output contains protocol headers, those lines might include carriage
+return (ASCII code 13) characters, even on platforms that otherwise normally
+only use linefeed to signify line separations - as curl shows the exact
+contents arriving from the server.