app: fix -Wpessimizing-move

clang14 doesn't compile because of
"moving a temporary object prevents copy elision".

This also alligns the plaintext socket with style of SSL socket.

Tested: trivial change. It builds.

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: I9203cf162d738290306f9ba73ec0ab8f2ca5033c
diff --git a/http/app.hpp b/http/app.hpp
index 18147e4..d3afe60 100644
--- a/http/app.hpp
+++ b/http/app.hpp
@@ -123,13 +123,12 @@
 
         if (-1 == socketFd)
         {
-            server = std::move(std::make_unique<server_t>(
-                this, bindaddrStr, portUint, nullptr, io));
+            server = std::make_unique<server_t>(this, bindaddrStr, portUint,
+                                                nullptr, io);
         }
         else
         {
-            server = std::move(
-                std::make_unique<server_t>(this, socketFd, nullptr, io));
+            server = std::make_unique<server_t>(this, socketFd, nullptr, io);
         }
         server->run();