Logging timestamps are always in UTC

[ston1th]

Hello guys

I have noticed that the UTC time is always used for the time format - this prevents the usage of the Z07:00 format string:

logfmtr/logfmtr.go

Line 258 in 5ffce92

b.WriteString(quote(time.Now().UTC().Format(c.tsFormat)))

Example using the default format string:

package main

import (
	"fmt"
	"time"
)

func main() {
	now := time.Now()
	format := "2006-01-02T15:04:05.000000000Z07:00"
	t1 := now.UTC().Format(format)
	t2 := now.Format(format)
	fmt.Println(t1)
	fmt.Println(t2)
}

Output:

2021-10-09T10:16:39.313042783Z
2021-10-09T14:16:39.313042783+04:00

So for people who want to log times in their respective timezone could there be a new Option whether to use UTC or timezone logging? The timezone is then later required for parsing the timestamp to the correct timezone (e.g. for tools like elastisearch).