Fix Zone 1 filegate.net BACKBONE.NA link

Not sure when this changed, but Thearcadeguy let me know it was a broken link.

exec/init-fidonet.ini

@@ -34,7 +34,7 @@ coord = Nick Andre
 email = nandre@net229.org
 fido  = 1:229/426
 dns   = binkp.net
-echolist = http://www.filegate.net/backbone/BACKBONE.NA
+echolist = http://www.filegate.net/pub/backbone/BACKBONE.NA
 
 [zone:2]
 name  = FidoNet