pveum: u2f: defuse the warning about certificates

since it seems (currently) to work with self-signed certificates as well
tested in chromium/chrome/firefox

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

diff --git a/pveum.adoc b/pveum.adoc
index 0cebe821df877608852dd3330fa5081d2aa9176c..6bc73b6b4e468b42085c460a289991fda75ee1c5 100644 (file)
--- a/pveum.adoc
+++ b/pveum.adoc
@@ -327,8 +327,9 @@ field before pressing the 'Apply' button.
 Server side U2F configuration
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-To allow users to use 'U2F' authentication, the server needs to have a valid
-domain with a valid https certificate. Initially an 'AppId'
+To allow users to use 'U2F' authentication, it may be necessary to use a valid
+domain with a valid https certificate, otherwise some browsers may print
+a warning or reject U2F usage altogether. Initially an 'AppId'
 footnote:[AppId https://developers.yubico.com/U2F/App_ID.html]
 needs to be configured.