Add:

>
> 	o Add new version of PQescapeString() that doesn't double backslashes
> 	  that are part of a client-only multibyte sequence
>
> 	  Single-quote is not a valid byte in any supported client-only
> 	  encoding.
>
> 	o Add new version of PQescapeString() that doesn't double
> 	  backslashes when standard_conforming_strings is true and
> 	  non-E strings are used