testing RPC over Unix socket + updated docs

docs/rpc_examples.md

@@ -158,10 +158,4 @@ sudo socat -d -d -t 5 - UNIX-CONNECT:/tmp/herodb.sock
 
 2) Paste a framed JSON-RPC request (Content-Length header, then a blank line, then the JSON body). For example to call hero_listDatabases:
 
-Content-Length: <LEN-BYTES-OF-JSON>
-
-{"jsonrpc":"2.0","id":3,"method":"hero_listDatabases","params":[]}
-
-Notes:
-- Replace <LEN-BYTES-OF-JSON> with the byte-length of the exact JSON payload you paste. There must be an empty line between the header and the JSON.
-- The response will appear in the same terminal, also framed with Content-Length.
+{"jsonrpc":"2.0","id":3,"method":"hero_listDatabases","params":[]}