curl.1: document the --time-cond option in the man page

diff --git a/docs/curl.1 b/docs/curl.1
index 3da4354958b0d27e3cd4e5f3c37b473dd8673892..a1307403520fd61b8a224f84332b22281ce81972 100644 (file)
--- a/docs/curl.1
+++ b/docs/curl.1
@@ -1413,6 +1413,9 @@ default 512 bytes will be used.
 If this option is used several times, the last one will be used.
 
 (Added in 7.20.0)
+.IP " -z, --time-cond TIME"
+Transfer based on a time condition.  TIME may to be preceded by -, +, or =.
+See the corresponding sections 14.24, 14.28, and 14.29 of RFC 2068.
 .IP "--tlsauthtype <authtype>"
 Set TLS authentication type. Currently, the only supported option is "SRP",
 for TLS-SRP (RFC 5054). If \fI--tlsuser\fP and \fI--tlspassword\fP are