Add checking for config files in user home directory

Check for configuration files in the home directory to make packaging XMRig for Linux easier.

src/base/kernel/Base.cpp

@@ -137,6 +137,18 @@ private:
             return config.release();
         }
         
+        chain.addFile(Process::location(Process::HomeLocation, ".xmrig.json"));
+
+        if (read(chain, config)) {
+            return config.release();
+        }
+        
+        chain.addFile(Process::location(Process::HomeLocation, ".config/xmrig.json"));
+
+        if (read(chain, config)) {
+            return config.release();
+        }
+
 #       ifdef XMRIG_FEATURE_EMBEDDED_CONFIG
         chain.addRaw(default_config);