Rootstock: hosts = ["*"] - allow all Host headers (was [])

VETIVER-9.0.1 enforces rpc.providers.web.http.hosts as a whitelist;
empty list / default rejects everything except 'Host: localhost'.

The traefik route uses 'customrequestheaders.Host=localhost' middleware
to rewrite the Host header, but that middleware appears not to be
applied for the rootstock route - real requests still arrive at rskj
with Host: rpc-de-XX.stakesquid.eu and rskj returns 400 Bad Request,
which traefik translates to 502 Bad Gateway.

Wildcard whitelist is fine here because traefik (with ipallowlist
middleware) is the actual gatekeeper.

Confirmed empirically: 'wget --header=Host:localhost' returns valid
JSON-RPC, anything else returns 400.

rootstock/bamboo/node.conf

@@ -11,7 +11,7 @@ rpc {
             http = {
                 enabled = true
                 bind_address = "0.0.0.0"
-                hosts = []
+                hosts = ["*"]
                 port = 8545
             }
             ws = {

rootstock/mainnet/node.conf

@@ -11,7 +11,7 @@ rpc {
             http = {
                 enabled = true
                 bind_address = "0.0.0.0"
-                hosts = []
+                hosts = ["*"]
                 port = 8545
             }
             ws = {