WWIV Network Packet Major and Minor Types and New Externals

main_type_net_info (0x0001):
 minor type
   0: mail to all sysops
   1: bbslist.net
   2: connect.net
   3: subs.lst
   4: wwivnews.net
   5: fbackhdr.net
   6: wwivnews.net
   7: categ.net
   8: networks.lst
   9: not defined
  10: regions.dat (unofficial)
  default: net info

main_type_email (0x0002):
  if from_sys==0 from_user==65535:
     Net Feedback
  else:
  minor type
    0: (NetPurge)
    1: (AutoSend)
    2: (Dead-Fix)

main_type_post (0x0003):
  sub_type determined by minor_type
  no longer used by net51

main_type_file (0x0004):
  unused in net3x and net5x

main_type_pre_post (0x0005):
  unused in net5x

...

main_type_new_extern 27 (0x001b):
  minor_type
    69: PackScan
   100: BRE*Link
   325: DRD Data
   326: DRD SigNet Extra
   327-330: DRD Misc Other
   395: K9NFX (Netfile)
   500: AutoSend ping
   501: AutoSend ping reply
   600: NetApp Request
   601: NetApp Application
   169 or 905:
        encapsulated wwivnet packet CMI ?

main_type_game_pack 28: (0x001c): 
   Type 28 Game Pack ???