Add oputil mb list-confs, update with prettier

core/oputil/oputil_help.js

@@ -182,6 +182,8 @@ General Information:
     MessageBase: `usage: oputil.js mb <action> [<arguments>]
 
 Actions:
+  list-confs                  List conferences and areas
+
   areafix CMD1 CMD2 ... ADDR  Sends an AreaFix NetMail
 
   NetMail is sent to supplied address  with the supplied command(s). Multi-part commands
@@ -194,6 +196,9 @@ Actions:
                               packet in the directory specified by PATH. The QWK
                               BBS ID will be obtained by the final component of PATH.
 
+list-confs arguments:
+  --areas                     Include areas within each message conference.
+
 import-areas arguments:
   --conf CONF_TAG             Conference tag in which to import areas
   --network NETWORK           Network name/key to associate FTN areas