bug#14979: 24.3; Feature Request: query-replace-backward

[Juri Linkov]

> A feature request: I often make use of query-replace and
> query-replace-regexp.  It would be useful to have a query-replace-backward
> and a query-replace-regexp-backward.  The backward variant would be
> executed when the forward variant is given a negative argument.

This feature is completely implemented now.  Thanks for the suggestion.