Bug 577049: POD must mention Bugzilla 4.0 instead of 3.8

Bugzilla/WebService/Bug.pm

@@ -1761,7 +1761,7 @@ for that value.
 
 =item Added in Bugzilla B<3.4>.
 
-=item Searching by C<votes> was removed in Bugzilla B<3.8>.
+=item Searching by C<votes> was removed in Bugzilla B<4.0>.
 
 =back
 
@@ -1923,8 +1923,8 @@ in them. The error message will have more details.
 =item Before B<3.0.4>, parameters marked as B<Defaulted> were actually
 B<Required>, due to a bug in Bugzilla.
 
-=item The C<groups> argument was added in Bugzilla B<3.8>. Before
-Bugzilla 3.8, bugs were only added into Mandatory groups by this
+=item The C<groups> argument was added in Bugzilla B<4.0>. Before
+Bugzilla 4.0, bugs were only added into Mandatory groups by this
 method.
 
 =back

Bugzilla/WebService/User.pm

@@ -612,7 +612,7 @@ function.
 
 =item Added in Bugzilla B<3.4>.
 
-=item C<group_ids> and C<groups> were added in Bugzilla B<3.8>.
+=item C<group_ids> and C<groups> were added in Bugzilla B<4.0>.
 
 =back
 

extensions/Voting/Extension.pm

@@ -75,7 +75,7 @@ sub db_schema_abstract_schema {
 
 sub install_update_db {
     my $dbh = Bugzilla->dbh;
-    # Note that before Bugzilla 3.8, voting was a built-in part of Bugzilla,
+    # Note that before Bugzilla 4.0, voting was a built-in part of Bugzilla,
     # so updates to the columns for old versions of Bugzilla happen in
     # Bugzilla::Install::DB, and can't safely be moved to this extension.