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-rw-r--r--docs/curl.15
1 files changed, 3 insertions, 2 deletions
diff --git a/docs/curl.1 b/docs/curl.1
index cf37d63c9..dd17f5512 100644
--- a/docs/curl.1
+++ b/docs/curl.1
@@ -171,10 +171,11 @@ a level of control).
.IP "-2, --sslv2"
(SSL) Forces curl to use SSL version 2 when negotiating with a remote SSL
server. Sometimes curl is built without SSLv2 support. SSLv2 is widely
-considered insecure.
+considered insecure (see RFC 6176).
.IP "-3, --sslv3"
(SSL) Forces curl to use SSL version 3 when negotiating with a remote SSL
-server. Sometimes curl is built without SSLv3 support.
+server. Sometimes curl is built without SSLv3 support. SSLv3 is widely
+considered insecure (see RFC 7568).
.IP "-4, --ipv4"
This option tells curl to resolve names to IPv4 addresses only, and not for
example try IPv6.