Update module lib/pq to v1.7.0 (#581)

Update module lib/pq to v1.7.0

Reviewed-on: https://kolaente.dev/vikunja/api/pulls/581

vendor/github.com/lib/pq/krb.go

@@ -1,40 +1,27 @@
 package pq
 
-import (
-	"net"
-	"strings"
-)
+// NewGSSFunc creates a GSS authentication provider, for use with
+// RegisterGSSProvider.
+type NewGSSFunc func() (GSS, error)
 
-/*
- *  Basic GSSAPI interface to abstract Windows (SSPI) from Unix
- *  APIs within the driver
- */
+var newGss NewGSSFunc
 
-type Gss interface {
+// RegisterGSSProvider registers a GSS authentication provider. For example, if
+// you need to use Kerberos to authenticate with your server, add this to your
+// main package:
+//
+//	import "github.com/lib/pq/auth/kerberos"
+//
+//	func init() {
+//		pq.RegisterGSSProvider(func() (pq.GSS, error) { return kerberos.NewGSS() })
+//	}
+func RegisterGSSProvider(newGssArg NewGSSFunc) {
+	newGss = newGssArg
+}
+
+// GSS provides GSSAPI authentication (e.g., Kerberos).
+type GSS interface {
 	GetInitToken(host string, service string) ([]byte, error)
 	GetInitTokenFromSpn(spn string) ([]byte, error)
 	Continue(inToken []byte) (done bool, outToken []byte, err error)
 }
-
-/*
- *  Find the A record associated with a hostname
- *  In general, hostnames supplied to the driver should be
- *  canonicalized because the KDC usually only has one
- *  principal and not one per potential alias of a host.
- */
-func canonicalizeHostname(host string) (string, error) {
-	canon := host
-
-	name, err := net.LookupCNAME(host)
-	if err != nil {
-		return "", err
-	}
-
-	name = strings.TrimSuffix(name, ".")
-
-	if name != "" {
-		canon = name
-	}
-
-	return canon, nil
-}