[lldb][mcp] Fix unix domain socket protocol server addresses

Author: aperez

lldb/source/Commands/CommandObjectProtocolServer.cpp

@@ -75,9 +75,12 @@ class CommandObjectProtocolServerStart : public CommandObjectParsed {
 
     ProtocolServer::Connection connection;
     connection.protocol = protocol_and_mode->first;
-    connection.name =
-        formatv("[{0}]:{1}", uri->hostname.empty() ? "0.0.0.0" : uri->hostname,
-                uri->port.value_or(0));
+    if (connection.protocol == Socket::SocketProtocol::ProtocolUnixDomain)
+      connection.name = uri->path;
+    else
+      connection.name = formatv(
+          "[{0}]:{1}", uri->hostname.empty() ? "0.0.0.0" : uri->hostname,
+          uri->port.value_or(0));
 
     if (llvm::Error error = server->Start(connection)) {
       result.AppendErrorWithFormatv("{0}", llvm::fmt_consume(std::move(error)));