* meta: Drop support for "meta link", since supporting this for internal

  links required meta to be run during scan, which complicated its data
  storage, since it had to clear data stored during the scan pass to avoid
  duplicating it during the normal preprocessing pass.
* If you used "meta link", you should switch to either "meta openid" (for
  openid delegations), or tags (for internal, invisible links). I assume
  that nobody really used "meta link" for external, non-openid links, since
  the htmlscrubber ate those. (Tell me differently and I'll consider bringing
  back that support.)
* meta: Improved data storage.
* meta: Drop the hackish filter hook that was used to clear
  stored data before preprocessing, this hack was ugly, and broken (cf:
  liw's disappearing openids).
* aggregate: Convert filter hook to a needsbuild hook.

1 files changed, 17 insertions, 32 deletions

diff --git a/doc/plugins/meta.mdwn b/doc/plugins/meta.mdwn
index f97e267ef..0696dc08e 100644
--- a/doc/plugins/meta.mdwn
+++ b/doc/plugins/meta.mdwn
@@ -13,38 +13,7 @@ also specifies some additional sub-parameters.
 The field values are treated as HTML entity-escaped text, so you can include
 a quote in the text by writing `"` and so on.
 
-You can use any field names you like, but here are some predefined ones:
-
-* link
-
-  Specifies a link to another page. This can be used as a way to make the
-  wiki treat one page as linking to another without displaying a user-visible
-  [[ikiwiki/WikiLink]]:
-
-	\[[meta link=otherpage]]
-
-  It can also be used to insert a html <link> tag. For example:
-
-  	\[[meta link="http://joeyh.myopenid.com/" rel="openid.delegate"]]
-
-  However, this latter syntax won't be allowed if the [[htmlscrubber]] is
-  enabled, since it can be used to insert unsafe content.
-
-* redir
-
-  Causes the page to redirect to another page in the wiki.
-
-  	\[[meta redir=otherpage]]
-
-  Optionally, a delay (in seconds) can be specified. The default is to
-  redirect without delay.
-
-  It can also be used to redirect to an external url. For example:
-
-  	\[[meta redir="http://example.com/"]]
-
-  However, this latter syntax won't be allowed if the [[htmlscrubber]] is
-  enabled, since it can be used to insert unsafe content.
+Supported fields:
 
 * title
 
@@ -100,6 +69,22 @@ You can use any field names you like, but here are some predefined ones:
   	\\[[meta openid="http://joeyh.myopenid.com/"
 	server="http://www.myopenid.com/server"]]
 
+* redir
+
+  Causes the page to redirect to another page in the wiki.
+
+  	\[[meta redir=otherpage]]
+
+  Optionally, a delay (in seconds) can be specified. The default is to
+  redirect without delay.
+
+  It can also be used to redirect to an external url. For example:
+
+  	\[[meta redir="http://example.com/"]]
+
+  However, this latter syntax won't be allowed if the [[htmlscrubber]] is
+  enabled, since it can be used to insert unsafe content.
+
 If the field is not one of the above predefined fields, the metadata will be
 written to the generated html page as a <meta> header. However, this
 won't be allowed if the [[htmlscrubber]] is enabled, since it can be used to