new caching system to replace old page cache

docs/changelog/6.x.x.txt

@@ -26,6 +26,8 @@
  - Added archive/unarchive options to CS threads.
  - Increased the performance of CS Thread viewing by 500%.
  - Added a database cache option as an alternative to memcached.
+ - Removed page caching system and added individual asset caches, because not
+   everything should cache in the same way.
  - Converted WebGUI to use a new object oriented session system. More details
    in migation.txt.
  - Added a lot more tests to the test suite.

docs/migration.txt

@@ -206,6 +206,17 @@ prepareView() in which HTML and HTTP headers must be set. See any of the
 existing assets and wobjects for implementation details.
 
 
+1.9 Removed Page Caching
+
+The page caching system that was cacheTimeout and cacheTimeoutVisitor on
+wobjects has been removed. Not everything caches in the same way and therefore
+we can't use a generic caching mechanism as much as we'd like to. Likewise,
+the www_view(1) cache override that has traditionally been used in wobjects is
+now gone since it's useless. If your asset needs caching, you'll need to add
+it yourself. See one of the dozen or so assets that come with WebGUI for
+ideas. Examples include Article, SQL Report, File, and Folder.
+
+
 
 2. Macro Migration
 -------------------

docs/upgrades/upgrade_6.8.7-6.99.0.pl

@@ -27,6 +27,7 @@ my $session = start(); # this line required
 addWorkflow();
 convertMessageLogToInbox();
 updateCs();
+changeCache();
 templateParsers();
 removeFiles();
 addSearchEngine();
@@ -45,6 +46,25 @@ addAdManager();
 
 finish($session); # this line required
 
+#-------------------------------------------------
+sub changeCache {
+	print "\tChanging page cache system.\n";
+	$session->db->write("alter table MessageBoard add column visitorCacheTimeout int not null default 3600");
+	$session->db->write("alter table Matrix add column visitorCacheTimeout int not null default 3600");
+	$session->db->write("alter table Collaboration add column visitorCacheTimeout int not null default 3600");
+	$session->db->write("alter table EventsCalendar add column visitorCacheTimeout int not null default 3600");
+	$session->db->write("alter table Folder add column visitorCacheTimeout int not null default 3600");
+	$session->db->write("alter table HttpProxy add column cacheTimeout int not null default 0");
+	$session->db->write("alter table SQLReport add column cacheTimeout int not null default 0");
+	$session->db->write("alter table FileAsset add column cacheTimeout int not null default 3600");
+	$session->db->write("alter table Product add column cacheTimeout int not null default 3600");
+	$session->db->write("alter table SyndicatedContent add column cacheTimeout int not null default 3600");
+	$session->db->write("alter table MultiSearch add column cacheTimeout int not null default 3600");
+	$session->db->write("alter table Article add column cacheTimeout int not null default 3600");
+	$session->db->write("alter table wobject drop column cacheTimeout");
+	$session->db->write("alter table wobject drop column cacheTimeoutVisitor");
+}
+
 #-------------------------------------------------
 sub addAdManager {
 	print "\tAdding advertising management.\n";