Merge pull request #915 from slingamn/issue817_fakelag.1

fix #817

irc/errors.go

@@ -60,6 +60,7 @@ var (
 	errCASFailed                      = errors.New("Compare-and-swap update of database value failed")
 	errEmptyCredentials               = errors.New("No more credentials are approved")
 	errCredsExternallyManaged         = errors.New("Credentials are externally managed and cannot be changed here")
+	errInvalidMultilineBatch          = errors.New("Invalid multiline batch")
 )
 
 // Socket Errors