Update - modify hub to support multiple networks. (#4)

Co-authored-by: jdl <jdl@desktop>
Reviewed-on: #4

hub/api/db/tables.defs

@@ -1,8 +1,6 @@
 TABLE config OF Config (
   ConfigID    int64  PK,
-  HubAddress  string,
-  VPNNetwork  []byte,
-  Password    []byte NoUpdate
+  Password    []byte
 );
 
 TABLE sessions OF Session NoUpdate (
@@ -13,7 +11,14 @@ TABLE sessions OF Session NoUpdate (
   LastSeenAt int64
 );
 
+TABLE networks OF Network (
+  NetworkID int64 PK,
+  Name      string NoUpdate,
+  Network   []byte NoUpdate
+);
+
 TABLE peers OF Peer (
+  NetworkID  int64 PK,
   PeerIP     byte PK,
   Version    int64,
   APIKey     string NoUpdate,