Linked glossary from cvs-migration page

Coming from CVS, I found the git glossary vital to learning git and learning
how terms in git correlate to the cvs terminology with which I am familiar.

This patch links the glossary from the cvs-migration page so cvs users will
be able to fine the glossary as soon as they start looking at git documents.

Signed-off-by: Matt Graham <mdg149@gmail.com>
Acked-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/cvs-migration.txt

@@ -8,7 +8,8 @@ designating a single shared repository which people can synchronize with;
 this document explains how to do that.
 
 Some basic familiarity with git is required.  This
-link:tutorial.html[tutorial introduction to git] should be sufficient.
+link:tutorial.html[tutorial introduction to git] and the
+link:glossary.html[git glossary] should be sufficient.
 
 Developing against a shared repository
 --------------------------------------