Integrate new header injectors with OAuth2 Proxy

pkg/validation/options.go

@@ -73,10 +73,6 @@ func Validate(o *options.Options) error {
 			"\n      use email-domain=* to authorize all email addresses")
 	}
 
-	if o.SetBasicAuth && o.SetAuthorization {
-		msgs = append(msgs, "mutually exclusive: set-basic-auth and set-authorization-header can not both be true")
-	}
-
 	if o.OIDCIssuerURL != "" {
 
 		ctx := context.Background()
@@ -161,10 +157,6 @@ func Validate(o *options.Options) error {
 		}
 	}
 
-	if o.PreferEmailToUser && !o.PassBasicAuth && !o.PassUserHeaders {
-		msgs = append(msgs, "PreferEmailToUser should only be used with PassBasicAuth or PassUserHeaders")
-	}
-
 	if o.SkipJwtBearerTokens {
 		// Configure extra issuers
 		if len(o.ExtraJwtIssuers) > 0 {