Add gpg-agent link in gpg-agent post.

diff --git a/posts/gpg-agent.mdwn b/posts/gpg-agent.mdwn
index fca0c8325053527d3d6f8df04d62b0dc940c336b..25c4f140c2643b5fe2216effc50493a8fc073d28 100644 (file)
--- a/posts/gpg-agent.mdwn
+++ b/posts/gpg-agent.mdwn
@@ -24,5 +24,7 @@ When you are done with the agent, kill it with
     $ killall gpg-agent
     $ rm -f "${HOME}/.gnupg/agent-info"
 
+[gpg-agent]: http://www.gnupg.org/documentation/manuals/gnupg/Invoking-GPG_002dAGENT.html
+
 [[!tag tags/linux]]
 [[!tag tags/tools]]