Leave a message in doc to indicate 0 is not acceptable

[to be squashed]

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4767)

diff --git a/doc/man1/req.pod b/doc/man1/req.pod
index d0d471f11fb440512305ca66c2a8820f7eb91447..5ed90ada740a53b5aa80206e8271a7f91eda143f 100644 (file)
--- a/doc/man1/req.pod
+++ b/doc/man1/req.pod
@@ -247,8 +247,8 @@ to the self signed certificate otherwise new request is created.
 =item B<-days n>
 
 When the B<-x509> option is being used this specifies the number of
-days to certify the certificate for, otherwise it is ignored.
-The default is 30 days.
+days to certify the certificate for, otherwise it is ignored. B<n> should
+be a positive integer. The default is 30 days.
 
 =item B<-set_serial n>