pgsql: Change \' to '', for SQL standards compliance.

Log Message:
-----------
Change \' to '', for SQL standards compliance. Backpatch to 7.3, 7.4,
and 8.0. Later releases already patched.

Tags:
----
REL7_3_STABLE

Modified Files:
--------------
pgsql/contrib/dbmirror:
DBMirror.pl (r1.3.2.2 -> r1.3.2.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/dbmirror/DBMirror.pl.diff?r1=1.3.2.2&r2=1.3.2.3)
pending.c (r1.6.2.5 -> r1.6.2.6)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/dbmirror/pending.c.diff?r1=1.6.2.5&r2=1.6.2.6)
pgsql/contrib/tsearch/expected:
tsearch.out (r1.6 -> r1.6.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch/expected/tsearch.out.diff?r1=1.6&r2=1.6.2.1)
pgsql/contrib/tsearch/sql:
tsearch.sql (r1.4 -> r1.4.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch/sql/tsearch.sql.diff?r1=1.4&r2=1.4.2.1)
pgsql/src/backend/utils/adt:
ruleutils.c (r1.124.2.2 -> r1.124.2.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/ruleutils.c.diff?r1=1.124.2.2&r2=1.124.2.3)
pgsql/src/bin/pg_dump:
pg_dump.c (r1.305.2.12 -> r1.305.2.13)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_dump.c.diff?r1=1.305.2.12&r2=1.305.2.13)
pgsql/src/bin/psql:
large_obj.c (r1.23 -> r1.23.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/large_obj.c.diff?r1=1.23&r2=1.23.2.1)
pgsql/src/bin/scripts:
createdb (r1.28 -> r1.28.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/createdb.diff?r1=1.28&r2=1.28.2.1)
pgsql/src/interfaces/ecpg/test:
test1.pgc (r1.28 -> r1.28.4.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test1.pgc.diff?r1=1.28&r2=1.28.4.1)
pgsql/src/interfaces/jdbc/org/postgresql/jdbc1:
AbstractJdbc1Statement.java (r1.12.2.7 -> r1.12.2.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/jdbc/org/postgresql/jdbc1/AbstractJdbc1Statement.java.diff?r1=1.12.2.7&r2=1.12.2.8)
pgsql/src/interfaces/libpq:
fe-exec.c (r1.122.2.1 -> r1.122.2.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-exec.c.diff?r1=1.122.2.1&r2=1.122.2.2)
pgsql/src/interfaces/python/tutorial:
func.py (r1.6 -> r1.6.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/python/tutorial/func.py.diff?r1=1.6&r2=1.6.2.1)
pgsql/src/pl/plpgsql/src:
gram.y (r1.39.2.2 -> r1.39.2.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/gram.y.diff?r1=1.39.2.2&r2=1.39.2.3)
pgsql/src/tutorial:
funcs.source (r1.5 -> r1.5.4.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tutorial/funcs.source.diff?r1=1.5&r2=1.5.4.1)