Fixup: prompting password from management

Commit b450414 added logic for reading password from management
when not in file or inline, but it was made conditional on
`response_from_stdin` which is always true! Fix by explicitly
checking for `password_from_stdin`.

Github: fixes OpenVPN/openvpn#1021

Change-Id: I4d46c3672691b159cbd98a17020c4f30782bc202
Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1638
Message-Id: <20260424161840.5767-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg36739.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>

src/openvpn/misc.c

@@ -336,6 +336,7 @@ get_user_pass_cr(struct user_pass *up, const char *auth_file, const char *prefix
              */
             if (management && (flags & GET_USER_PASS_MANAGEMENT)
                 && management_query_user_pass_enabled(management)
+                && password_from_stdin
                 && !(flags & GET_USER_PASS_USERNAME_ONLY))
             {
                 msg(D_LOW,