webserver: Miscellaneous build fixes for AOSP.

Un-platform2-ify by dropping leading "webserver/" from
relative include paths.

Also pass char** rather than uint8_t** to
BIO_get_mem_data().

BUG=none
TEST=tests pass

Change-Id: I618412553c9d0fd9b4f86861b911a9ffe2899454
Reviewed-on: https://chromium-review.googlesource.com/293900
Trybot-Ready: Dan Erat <derat@chromium.org>
Tested-by: Dan Erat <derat@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Dan Erat <derat@chromium.org>
diff --git a/libwebserv/protocol_handler.cc b/libwebserv/protocol_handler.cc
index 6b0ec77..53514be 100644
--- a/libwebserv/protocol_handler.cc
+++ b/libwebserv/protocol_handler.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "webserver/libwebserv/protocol_handler.h"
+#include "libwebserv/protocol_handler.h"
 
 #include <tuple>
 
@@ -10,11 +10,11 @@
 #include <chromeos/map_utils.h>
 
 #include "libwebserv/org.chromium.WebServer.RequestHandler.h"
+#include "libwebserv/request.h"
+#include "libwebserv/request_handler_callback.h"
+#include "libwebserv/response.h"
+#include "libwebserv/server.h"
 #include "webservd/dbus-proxies.h"
-#include "webserver/libwebserv/request.h"
-#include "webserver/libwebserv/request_handler_callback.h"
-#include "webserver/libwebserv/response.h"
-#include "webserver/libwebserv/server.h"
 
 namespace libwebserv {