made syslog protocol lower case

Signed-off-by: bluca <bruno.luca@mercadolibre.com>

outputs/syslog.go

@@ -7,10 +7,11 @@ import (
 	"github.com/falcosecurity/falcosidekick/types"
 	"log"
 	"log/syslog"
+	"strings"
 )
 
 func NewSyslogClient(config *types.Configuration, stats *types.Statistics, promStats *types.PromStatistics, statsdClient, dogstatsdClient *statsd.Client) (*Client, error) {
-	ok := validateProtocol(config.Syslog.Protocol)
+	ok := isValidProtocolString(strings.ToLower(config.Syslog.Protocol))
 	if !ok {
 		return nil, fmt.Errorf("failed to configure Syslog client: invalid protocol %s", config.Syslog.Protocol)
 	}
@@ -25,7 +26,7 @@ func NewSyslogClient(config *types.Configuration, stats *types.Statistics, promS
 	}, nil
 }
 
-func validateProtocol(protocol string) bool {
+func isValidProtocolString(protocol string) bool {
 	return protocol == TCP || protocol == UDP
 }