GH628: Add -help to all apps docs.

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

doc/apps/ciphers.pod

diff --git a/doc/apps/ciphers.pod b/doc/apps/ciphers.pod
index 0238db3..9029ada 100644
--- a/doc/apps/ciphers.pod
+++ b/doc/apps/ciphers.pod
@@ -7,6 +7,7 @@
 =head1 SYNOPSIS
 
 B<openssl> B<ciphers>
+[B<-help>]
 [B<-s>]
 [B<-v>]
 [B<-V>]
@@ -29,6 +30,10 @@
 
 =over 4
 
+=item B<-help>
+
+Print out a usage message.
+
 =item B<-s>
 
 Only list supported ciphers: those consistent with the security level. This