web commit by BrandenRobinson: Add brainstorming about email change notification.

doc/todo.mdwn

@@ -19,6 +19,28 @@ is built. (As long as all changes to all pages is ok.)
   already, so just look at the userdb, svnlook at what's changed, and send
   mails to people who have subscribed.
 
+  A few details:
+  1. [[Joey]] mentioned that being able to subscribe to globs as well as
+     explicitly named pages would be desirable.
+  2. I think that since we're using Perl on the backend, being able to
+     let users craft their own arbitrary regexes would be good.
+  3. Of course if you do that, you want to have form processing on the user
+     page that lets them tune it, and probably choose literal or glob by
+     default.
+
+  The first cut, I suppose, could use one sendmail process to batch-mail all
+  subscribers for a given page.  However, in the long run, I can see users
+  demanding a bit of feature creep:
+
+  4. Each user should be able to tune whether they see the actual diff parts or
+     not.
+  5. Each user should be able to set a maximum desired email size.
+  6. We might want to support a user-specified shibboleth string that will be
+     included in the email they receive so they can easily procmail the messages
+     into a folder.
+
+  --[[BrandenRobinson]]
+
 ## pluggable renderers
 
 I'm considering a configurable rendering pipeline for each supported