epee: protect base64_chars, removed dead functions, speed up compile

contrib/epee/include/net/abstract_http_client.h

@@ -54,7 +54,6 @@ namespace net_utils
   std::string convert(char val);
   std::string conver_to_url_format(const std::string& uri);
   std::string convert_from_url_format(const std::string& uri);
-  std::string convert_to_url_format_force_all(const std::string& uri);
 
 namespace http
 {

contrib/epee/include/storages/http_abstract_invoke.h

@@ -26,13 +26,10 @@
 // 
 
 #pragma once
-#include <boost/utility/string_ref.hpp>
-#include <chrono>
-#include <string>
-#include "byte_slice.h"
-#include "portable_storage_template_helper.h"
+
 #include "net/http_base.h"
-#include "net/http_server_handlers_map2.h"
+#include "net/jsonrpc_structs.h"
+#include "portable_storage_template_helper.h"
 
 namespace epee
 {
@@ -136,12 +133,5 @@ namespace epee
       epee::json_rpc::error error_struct;
       return invoke_http_json_rpc(uri, method_name, out_struct, result_struct, error_struct, transport, timeout, http_method, req_id);
     }
-
-    template<class t_command, class t_transport>
-    bool invoke_http_json_rpc(const boost::string_ref uri, typename t_command::request& out_struct, typename t_command::response& result_struct, t_transport& transport, std::chrono::milliseconds timeout = std::chrono::seconds(15), const boost::string_ref http_method = "POST", const std::string& req_id = "0")
-    {
-      return invoke_http_json_rpc(uri, t_command::methodname(), out_struct, result_struct, transport, timeout, http_method, req_id);
-    }
-
-  }
-}
+  } // namespace net_utils
+} // namespace epee

contrib/epee/include/string_coding.h

@@ -35,7 +35,7 @@ namespace epee
 namespace string_encoding
 {
 	inline 
-	std::string& base64_chars()
+	const std::string& base64_chars()
 	{
 
 		static std::string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

contrib/epee/src/abstract_http_client.cpp

@@ -116,16 +116,6 @@ namespace net_utils
     return result;
   }
   //----------------------------------------------------------------------------------------------------
-  std::string convert_to_url_format_force_all(const std::string& uri)
-  {
-    std::string result;
-
-    for(size_t i = 0; i!= uri.size(); i++)
-    {
-        result += convert(uri[i]);
-    }
-    return result;
-  }
 
 namespace http
 {