[+] Added new "private" network for no-chains network

[-] Removed gdb chain from Kelvin testnet

dist/etc/network/private.cfg

+# Kelvin Blockchain: development network
+# General section
+[general]
+id=0xFF00000000000001
+name=private
+type=testing
+# Possible values: light, full, archive, master, root
+node-role=full
+#node-alias=addr-%node_addr%
+gdb_groups_prefix=local-testnet
+
+#[dag-poa]
+#events-sign-cert=mycert
+
+#[dag-pos]
+#events-sign-wallet=mywallet

libdap-chain-net @ f7c68925

-Subproject commit 515795800f4d6bf717e7649c7b424b6f46f7559e
+Subproject commit f7c689254a5a56de32e1fbca44fe11f7a9991afc