2. reduce the number R: lines on a bull from a bbs to 2 (the origin and the
last port of call).
3. ignore deleted messages for queuing purposes
+4. store deleted status across restarts!
+5. make callsign checking more rigorous
+6. dup check PC49 (kill full)
03Oct01=======================================================================
1. don't allow @WWW to become a 'TO' field...
2. handle @gb7tlh.#35.eu type addresses as well