Add back bwscanner files

because sbws is now using chutney and it would be better the
files are maintained as part of chutney.
This will also help to reproduce #40013 .

networks/bwscanner

@@ -0,0 +1,20 @@
+# By default, Authorities are not configured as exits
+Authority = Node(tag="a", authority=1, relay=1, torrc="authority.tmpl")
+# #40013: All the relays get the EXIT flag
+# The relay-non-exit.tmpl includes the relay-non-dir.tmpl, which includdes
+# `${include:common.i} ExitRelay=0` and common.i generates a torrc file with
+# ExitRelay 0
+# ExitRelay 0
+# ExitPolicy reject *:*
+NonExitRelay = Node(tag="m", relay=1, exit=0, torrc="relay-non-exit.tmpl")
+ExitRelay = Node(tag="r", relay=1, exit=1, torrc="relay.tmpl")
+Client = Node(tag="c", client=1, torrc="client_bwscanner.tmpl")
+RelayMAB = Node(tag="relay1mbyteMAB", relay=1, exit=1, torrc="relay-MAB.tmpl")
+RelayMBR = Node(tag="relay1mbyteMBR", relay=1, exit=1, torrc="relay-MBR.tmpl")
+
+NODES = Authority.getN(3) + \
+      NonExitRelay.getN(7) + \
+      RelayMBR.getN(1) + RelayMAB.getN(1) + \
+      ExitRelay.getN(3) + Client.getN(1)
+
+ConfigureNodes(NODES)

torrc_templates/client_bwscanner.tmpl

@@ -0,0 +1,12 @@
+${include:common.i}
+SocksPort $socksport
+UseEntryGuards 0
+UseMicroDescriptors 0
+FetchDirInfoEarly 1
+FetchDirInfoExtraEarly 1
+FetchUselessDescriptors 1
+LearnCircuitBuildTimeout 0
+CircuitBuildTimeout 60
+ConnectionPadding 0
+__DisablePredictedCircuits 1
+__LeaveStreamsUnattached 1

torrc_templates/relay-MAB.tmpl

@@ -0,0 +1,4 @@
+${include:relay-non-exit.tmpl}
+
+Nickname relay1mbyteMAB
+MaxAdvertisedBandwidth 1 MBytes

torrc_templates/relay-MBR.tmpl

@@ -0,0 +1,4 @@
+${include:relay-non-exit.tmpl}
+
+Nickname relay1mbyteMBR
+RelayBandwidthRate 1 MBytes