Added tls for http clients (#5766)

* Added global http client

* Added Do func for global http client

* Changed the code to use the global http client

* Fix http client in volume uploader

* Fixed pkg name

* Fixed http util funcs

* Fixed http client for bench_filer_upload

* Fixed http client for stress_filer_upload

* Fixed http client for filer_server_handlers_proxy

* Fixed http client for command_fs_merge_volumes

* Fixed http client for command_fs_merge_volumes and command_volume_fsck

* Fixed http client for s3api_server

* Added init global client for main funcs

* Rename global_client to client

* Changed:
- fixed NewHttpClient;
- added CheckIsHttpsClientEnabled func
- updated security.toml in scaffold

* Reduce the visibility of some functions in the util/http/client pkg

* Added the loadSecurityConfig function

* Use util.LoadSecurityConfiguration() in NewHttpClient func

weed/server/master_server.go

@@ -30,6 +30,7 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/topology"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 	"github.com/seaweedfs/seaweedfs/weed/wdclient"
+	util_http "github.com/seaweedfs/seaweedfs/weed/util/http"
 )
 
 const (
@@ -256,7 +257,7 @@ func (ms *MasterServer) proxyToLeader(f http.HandlerFunc) http.HandlerFunc {
 			}
 			director(req)
 		}
-		proxy.Transport = util.Transport
+		proxy.Transport = util_http.GetGlobalHttpClient().GetClientTransport()
 		proxy.ServeHTTP(w, r)
 	}
 }