Add []byte to bytea sanitization

sanitize.go

@@ -1,6 +1,7 @@
 package pgx
 
 import (
+	"encoding/hex"
 	"reflect"
 	"regexp"
 	"strconv"
@@ -44,6 +45,8 @@ func (c *Connection) SanitizeSql(sql string, args ...interface{}) (output string
 			return strconv.FormatFloat(float64(arg), 'f', -1, 32)
 		case float64:
 			return strconv.FormatFloat(arg, 'f', -1, 64)
+		case []byte:
+			return `E'\\x` + hex.EncodeToString(arg) + `'`
 		default:
 			panic("Unable to sanitize type: " + reflect.TypeOf(arg).String())
 		}

sanitize_test.go

@@ -34,4 +34,14 @@ func TestSanitizeSql(t *testing.T) {
 	if conn.SanitizeSql("select $1, $2, $3", "Jack's", 42, 1.23) != "select 'Jack''s', 42, 1.23" {
 		t.Error("Failed to sanitize multiple params")
 	}
+
+	bytea := make([]byte, 4)
+	bytea[0] = 0   // 0x00
+	bytea[1] = 15  // 0x0F
+	bytea[2] = 255 // 0xFF
+	bytea[3] = 17  // 0x11
+
+	if conn.SanitizeSql("select $1", bytea) != `select E'\\x000fff11'` {
+		t.Error("Failed to sanitize []byte")
+	}
 }