Rename includeconf variables for clarity

includeconf -> conf_file_names
to_include -> conf_file_name
include_config -> conf_file_stream

Suggestion from John Newbery <[email protected]> in
bitcoin#15934 (comment)

Author: ryanofsky

src/util/system.cpp

@@ -908,12 +908,12 @@ bool ArgsManager::ReadConfigFiles(std::string& error, bool ignore_invalid_keys)
         }
         if (use_conf_file) {
             std::string chain_id = GetChainName();
-            std::vector<std::string> includeconf(GetArgs("-includeconf"));
+            std::vector<std::string> conf_file_names(GetArgs("-includeconf"));
             {
                 // We haven't set m_network yet (that happens in SelectParams()), so manually check
                 // for network.includeconf args.
                 std::vector<std::string> includeconf_net(GetArgs(std::string("-") + chain_id + ".includeconf"));
-                includeconf.insert(includeconf.end(), includeconf_net.begin(), includeconf_net.end());
+                conf_file_names.insert(conf_file_names.end(), includeconf_net.begin(), includeconf_net.end());
             }
 
             // Remove -includeconf from configuration, so we can warn about recursion
@@ -924,33 +924,33 @@ bool ArgsManager::ReadConfigFiles(std::string& error, bool ignore_invalid_keys)
                 m_config_args.erase(std::string("-") + chain_id + ".includeconf");
             }
 
-            for (const std::string& to_include : includeconf) {
-                fsbridge::ifstream include_config(GetConfigFile(to_include));
-                if (include_config.good()) {
-                    if (!ReadConfigStream(include_config, to_include, error, ignore_invalid_keys)) {
+            for (const std::string& conf_file_name : conf_file_names) {
+                fsbridge::ifstream conf_file_stream(GetConfigFile(conf_file_name));
+                if (conf_file_stream.good()) {
+                    if (!ReadConfigStream(conf_file_stream, conf_file_name, error, ignore_invalid_keys)) {
                         return false;
                     }
-                    LogPrintf("Included configuration file %s\n", to_include);
+                    LogPrintf("Included configuration file %s\n", conf_file_name);
                 } else {
-                    error = "Failed to include configuration file " + to_include;
+                    error = "Failed to include configuration file " + conf_file_name;
                     return false;
                 }
             }
 
             // Warn about recursive -includeconf
-            includeconf = GetArgs("-includeconf");
+            conf_file_names = GetArgs("-includeconf");
             {
                 std::vector<std::string> includeconf_net(GetArgs(std::string("-") + chain_id + ".includeconf"));
-                includeconf.insert(includeconf.end(), includeconf_net.begin(), includeconf_net.end());
+                conf_file_names.insert(conf_file_names.end(), includeconf_net.begin(), includeconf_net.end());
                 std::string chain_id_final = GetChainName();
                 if (chain_id_final != chain_id) {
                     // Also warn about recursive includeconf for the chain that was specified in one of the includeconfs
                     includeconf_net = GetArgs(std::string("-") + chain_id_final + ".includeconf");
-                    includeconf.insert(includeconf.end(), includeconf_net.begin(), includeconf_net.end());
+                    conf_file_names.insert(conf_file_names.end(), includeconf_net.begin(), includeconf_net.end());
                 }
             }
-            for (const std::string& to_include : includeconf) {
-                tfm::format(std::cerr, "warning: -includeconf cannot be used from included files; ignoring -includeconf=%s\n", to_include);
+            for (const std::string& conf_file_name : conf_file_names) {
+                tfm::format(std::cerr, "warning: -includeconf cannot be used from included files; ignoring -includeconf=%s\n", conf_file_name);
             }
         }
     }