Update module lib/pq to v1.6.0 (#572)

Update module lib/pq to v1.6.0

Reviewed-on: https://kolaente.dev/vikunja/api/pulls/572

vendor/github.com/jcmturner/gokrb5/v8/krberror/error.go

@@ -0,0 +1,67 @@
+// Package krberror provides error type and functions for gokrb5.
+package krberror
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Error type descriptions.
+const (
+	separator       = " < "
+	EncodingError   = "Encoding_Error"
+	NetworkingError = "Networking_Error"
+	DecryptingError = "Decrypting_Error"
+	EncryptingError = "Encrypting_Error"
+	ChksumError     = "Checksum_Error"
+	KRBMsgError     = "KRBMessage_Handling_Error"
+	ConfigError     = "Configuration_Error"
+	KDCError        = "KDC_Error"
+)
+
+// Krberror is an error type for gokrb5
+type Krberror struct {
+	RootCause string
+	EText     []string
+}
+
+// Error function to implement the error interface.
+func (e Krberror) Error() string {
+	return fmt.Sprintf("[Root cause: %s] ", e.RootCause) + strings.Join(e.EText, separator)
+}
+
+// Add another error statement to the error.
+func (e *Krberror) Add(et string, s string) {
+	e.EText = append([]string{fmt.Sprintf("%s: %s", et, s)}, e.EText...)
+}
+
+// New creates a new instance of Krberror.
+func New(et, s string) Krberror {
+	return Krberror{
+		RootCause: et,
+		EText:     []string{s},
+	}
+}
+
+// Errorf appends to or creates a new Krberror.
+func Errorf(err error, et, format string, a ...interface{}) Krberror {
+	if e, ok := err.(Krberror); ok {
+		e.Add(et, fmt.Sprintf(format, a...))
+		return e
+	}
+	return NewErrorf(et, format+": %s", append(a, err)...)
+}
+
+// NewErrorf creates a new Krberror from a formatted string.
+func NewErrorf(et, format string, a ...interface{}) Krberror {
+	var s string
+	if len(a) > 0 {
+		s = fmt.Sprintf("%s: %s", et, fmt.Sprintf(format, a...))
+	} else {
+		s = fmt.Sprintf("%s: %s", et, format)
+	}
+	return Krberror{
+		RootCause: et,
+		EText:     []string{s},
+	}
+}