Additional name for all commands

Add openssl-foo as a name for the openssl "foo" command.
Addresses an issue found by a usability study to be published.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4553)

doc/man1/spkac.pod

diff --git a/doc/man1/spkac.pod b/doc/man1/spkac.pod
index 14fdd0b..75b12d8 100644
--- a/doc/man1/spkac.pod
+++ b/doc/man1/spkac.pod
@@ -2,6 +2,7 @@
 
 =head1 NAME
 
+openssl-spkac,
 spkac - SPKAC printing and generating utility
 
 =head1 SYNOPSIS