Use this to hook into ikiwiki's cgi script. Each registered cgi hook is
called in turn, and passed a CGI object. The hook should examine the
-parameters, and if it will handle this CGI request, output a page (including the http headers) and
-terminate the program.
+parameters, and if it will handle this CGI request, output a page
+(including the http headers) and terminate the program.
+
+Note that cgi hooks are called as early as possible, before any ikiwiki
+state is loaded, and with no session information.
### auth
## Internal use pages
-Sometimes it's useful to put pages in the wiki without having them be
-rendered to individual html files. Such internal use pages are collected
-together to form the RecentChanges page, for example.
+Sometimes it's useful to put pages in the wiki without the overhead of
+having them be rendered to individual html files. Such internal use pages
+are collected together to form the RecentChanges page, for example.
To make an internal use page, register a filename extension that starts
-with "_". Internal use pages cannot be edited with the web interface, are
-not scanned for wikilinks (though wikilinks and preprocessor directives can
-appear on them, this is rarely a good idea and should be done with caution),
-and are not matched by regular PageSpecs glob patterns, but instead only by a
-special `internal()` [[ikiwiki/PageSpec]].
-
-Ikiwiki is optimised to handle lots of internal use pages, very quickly.
+with "_". Internal use pages cannot be edited with the web interface,
+generally shouldn't contain wikilinks or preprocessor directives (use
+either on them with extreme caution), and are not matched by regular
+PageSpecs glob patterns, but instead only by a special `internal()`
+[[ikiwiki/PageSpec]].
## RCS plugins