Clarify --capath option in manpage

Clarify --capath option in manpage

Prevent confusion as described in trac #422 by better explaining the
behaviour of --capath, and providing pointers to relevant openssl man
pages.

Attached are patches for the master and release/2.3 branches.  The only
difference is that in the master patch, a line referencing the
requirement for OpenSSL 0.9.7 is removed, since master already requires
OpenSSL >= 0.9.8.

-Steffan

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>From 3626088e146dbf959d7ec73f4e7cc5ab24c1ad57 Mon Sep 17 00:00:00 2001
From: Steffan Karger <steffan@karger.me>
Date: Sun, 24 May 2015 11:18:34 +0200
Subject: [PATCH] Clarify --capath option in manpage

Prevent confusion as described in trac #422 by better explaining the
behaviour of --capath, and providing pointers to relevant openssl man
pages.

Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <55619DC4.2020108@karger.me>
URL: http://article.gmane.org/gmane.network.openvpn.devel/9732
Signed-off-by: Gert Doering <gert@greenie.muc.de>