 * All users have a weight of 0 to start
 * All requests have a weight of total servers over servers capable of meeting
   the request.

User wight is:
+0 when not registered
+4 Registered user
+4 per active host under user name (completed at least one request recently)
+2 per inactive host under user (that was hosting recently)

Request weight is:
+(total/capable)  total servers over servers capable of meeting the request.
+(4 * age in minutes) Age weight
