Allow sending messages by directly providing them as a ssh commandline argument, by reading process.command

asserver.py

@@ -55,6 +55,12 @@ async def handle_connection(process: asyncssh.SSHServerProcess):
         connected_msg = f"[connected] {username}\n"
         stderr.write(connected_msg)
         broadcast(connected_msg, True)
+        if process.command is not None:
+            line = process.command.strip("\r\n")
+            msg = f"{username}: {line}\n"
+            stdout.write(msg)
+            broadcast(msg)
+        else:
             while True:
                 try:
                     async for line in process.stdin: