added facilty for syslog

include/spdlog/details/spdlog_impl.h

@@ -162,9 +162,9 @@ inline std::shared_ptr<spdlog::logger> spdlog::stderr_color_st(const std::string
 
 #ifdef SPDLOG_ENABLE_SYSLOG
 // Create syslog logger
-inline std::shared_ptr<spdlog::logger> spdlog::syslog_logger(const std::string& logger_name, const std::string& syslog_ident, int syslog_option)
+inline std::shared_ptr<spdlog::logger> spdlog::syslog_logger(const std::string& logger_name, const std::string& syslog_ident, int syslog_option, int syslog_facility)
 {
-    return create<spdlog::sinks::syslog_sink>(logger_name, syslog_ident, syslog_option);
+    return create<spdlog::sinks::syslog_sink>(logger_name, syslog_ident, syslog_option, syslog_facility);
 }
 #endif
 

include/spdlog/spdlog.h

@@ -106,7 +106,7 @@ std::shared_ptr<logger> stderr_color_st(const std::string& logger_name);
 // Create and register a syslog logger
 //
 #ifdef SPDLOG_ENABLE_SYSLOG
-std::shared_ptr<logger> syslog_logger(const std::string& logger_name, const std::string& ident = "", int syslog_option = 0);
+std::shared_ptr<logger> syslog_logger(const std::string& logger_name, const std::string& ident = "", int syslog_option = 0, int syslog_facilty = (1<<3));
 #endif
 
 #if defined(__ANDROID__)