Add specific syslogtag

docs/configuration.md

@@ -186,6 +186,7 @@ imgproxy can send logs to syslog, but this feature is disabled by default. To en
 * `IMGPROXY_SYSLOG_LEVEL`: maximum log level to send to syslog. Known levels are: `crit`, `error`, `warning` and `notice`. Default: `notice`;
 * `IMGPROXY_SYSLOG_NETWORK`: network that will be used to connect to syslog. When blank, the local syslog server will be used. Known networks are `tcp`, `tcp4`, `tcp6`, `udp`, `udp4`, `udp6`, `ip`, `ip4`, `ip6`, `unix`, `unixgram` and `unixpacket`. Default: blank;
 * `IMGPROXY_SYSLOG_ADDRESS`: address of the syslog service. Not used if `IMGPROXY_SYSLOG_NETWORK` is blank. Default: blank;
+* `IMGPROXY_SYSLOG_TAG`: specific syslogtag. Default: `imgproxy`;
 
 ### Memory usage tweaks
 

syslog.go

@@ -34,7 +34,10 @@ func initSyslog() {
 	strEnvConfig(&network, "IMGPROXY_SYSLOG_NETWORK")
 	strEnvConfig(&addr, "IMGPROXY_SYSLOG_ADDRESS")
 
-	syslogWriter, err = syslog.Dial(network, addr, syslog.LOG_NOTICE, "imgproxy")
+	tag := "imgproxy"
+	strEnvConfig(&tag, "IMGPROXY_SYSLOG_TAG")
+
+	syslogWriter, err = syslog.Dial(network, addr, syslog.LOG_NOTICE, tag)
 
 	if err != nil {
 		log.Fatalf("Can't connect to syslog: %s", err)