Include commit author information in Soy data for change email templates

Feature: Issue 7412
Change-Id: I0db22f44e1be473aca790c141810f878cf9f6a9f
diff --git a/Documentation/config-mail.txt b/Documentation/config-mail.txt
index af2bd98..1a27fae 100644
--- a/Documentation/config-mail.txt
+++ b/Documentation/config-mail.txt
@@ -231,6 +231,14 @@
 +
 The refname of the patch set.
 
+$patchSetInfo.authorName::
++
+The name of the author of the patch set.
+
+$patchSetInfo.authorEmail::
++
+The email address of the author of the patch set.
+
 GERRIT
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 Part of link:index.html[Gerrit Code Review]