Add missing mail template examples to site init

Add a few mail templates that were not being extracted during the
site init.

Also add missing mail template documentation.

Change-Id: I66773ad1ca74d834b29bd6a7f3ee190633e30dc1

Documentation/config-mail.txt

@@ -72,6 +72,13 @@ The `NewChange.vm` template will determine the contents of the email related
 to a user submitting a new change for review. It is a `ChangeEmail`: see
 `ChangeSubject.vm` and `ChangeFooter.vm`.
 
+RebasedPatchSet.vm
+~~~~~~~~~~~~~~~~~~
+
+The `RebasedPatchSet.vm` template will determine the contents of the email
+related to a user rebasing a patchset for a change through the Gerrit UI.
+It is a `ChangeEmail`: see `ChangeSubject.vm` and `ChangeFooter.vm`.
+
 RegisterNewEmail.vm
 ~~~~~~~~~~~~~~~~~~~
 
@@ -92,6 +99,12 @@ The `Restored.vm` template will determine the contents of the email related
 to a change being restored.  It is a `ChangeEmail`: see `ChangeSubject.vm` and
 `ChangeFooter.vm`.
 
+Reverted.vm
+~~~~~~~~~~~
+
+The `Reverted.vm` template will determine the contents of the email related
+to a change being reverted.  It is a `ChangeEmail`: see `ChangeSubject.vm` and
+`ChangeFooter.vm`.
 
 
 Mail Variables and Methods

gerrit-pgm/src/main/java/com/google/gerrit/pgm/init/SitePathInitializer.java

@@ -92,8 +92,11 @@ public class SitePathInitializer {
     extractMailExample("Merged.vm");
     extractMailExample("MergeFail.vm");
     extractMailExample("NewChange.vm");
+    extractMailExample("RebasedPatchSet.vm");
     extractMailExample("RegisterNewEmail.vm");
     extractMailExample("ReplacePatchSet.vm");
+    extractMailExample("Restored.vm");
+    extractMailExample("Reverted.vm");
 
     if (!ui.isBatch()) {
       System.err.println();