Remove baidu-specific descriptions from comments

src/brpc/policy/http_rpc_protocol.cpp

@@ -1212,8 +1212,8 @@ void ProcessHttpRequest(InputMessageBase *msg) {
         }
     } else if (security_mode) {
         cntl->SetFailed(EPERM, "Not allowed to access builtin services, try "
-                        "ServerOptions.internal_port=%d instead if you're inside"
-                        " Baidu's network", server->options().internal_port);
+                        "ServerOptions.internal_port=%d instead if you're in"
+                        " internal network", server->options().internal_port);
         cntl->http_response().set_status_code(HTTP_STATUS_FORBIDDEN);
         return SendHttpResponse(cntl.release(), server, method_status);
     }

src/brpc/server.h

@@ -241,7 +241,7 @@ struct ServerOptions {
     // Provide builtin services at this port rather than the port to Start().
     // When your server needs to be accessed from public (including traffic
     // redirected by nginx or other http front-end servers), set this port
-    // to a port number that's ONLY accessible from Baidu's internal network
+    // to a port number that's ONLY accessible from internal network
     // so that you can check out the builtin services from this port while
     // hiding them from public. Setting this option also enables security
     // protection code which we may add constantly.

src/butil/synchronization/lock.h

-// Baidu RPC - A framework to host and access services throughout Baidu.
 // Copyright (c) 2017 Baidu, Inc
 // Date: Thu Jan 19 16:19:30 CST 2017
 

src/json2pb/protobuf_map.h

-// Baidu RPC - A framework to host and access services throughout Baidu.
 // Copyright (c) 2014 Baidu, Inc.
 //
 // Author: Rujie,Jiang jiangrujie@baidu.com