pgsql: Add: > > o Add new version of PQescapeString() that doesn't

Log Message:
-----------
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

Modified Files:
--------------
    pgsql/doc:
        TODO (r1.1798 -> r1.1799)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1798&r2=1.1799)
    pgsql/doc/src/FAQ:
        TODO.html (r1.302 -> r1.303)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.302&r2=1.303)