pgsql: Add E'' to internally created SQL strings that contain

Log Message:
-----------
Add E'' to internally created SQL strings that contain backslashes.

Improve code clarity by using macros for E'' processing.

Modified Files:
--------------
pgsql/src/backend/utils/adt:
quote.c (r1.15 -> r1.16)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/quote.c.diff?r1=1.15&r2=1.16)
ruleutils.c (r1.202 -> r1.203)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/ruleutils.c.diff?r1=1.202&r2=1.203)
pgsql/src/bin/initdb:
initdb.c (r1.89 -> r1.90)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/initdb/initdb.c.diff?r1=1.89&r2=1.90)
pgsql/src/bin/pg_dump:
dumputils.c (r1.18 -> r1.19)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/dumputils.c.diff?r1=1.18&r2=1.19)
pg_dump.c (r1.412 -> r1.413)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_dump.c.diff?r1=1.412&r2=1.413)
pgsql/src/bin/psql:
describe.c (r1.119 -> r1.120)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/describe.c.diff?r1=1.119&r2=1.120)
large_obj.c (r1.38 -> r1.39)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/large_obj.c.diff?r1=1.38&r2=1.39)
pgsql/src/include:
c.h (r1.186 -> r1.187)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/c.h.diff?r1=1.186&r2=1.187)
pgsql/src/interfaces/ecpg/ecpglib:
execute.c (r1.40 -> r1.41)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/execute.c.diff?r1=1.40&r2=1.41)
pgsql/src/interfaces/ecpg/preproc:
preproc.y (r1.307 -> r1.308)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/preproc.y.diff?r1=1.307&r2=1.308)
pgsql/src/interfaces/libpq:
fe-exec.c (r1.169 -> r1.170)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-exec.c.diff?r1=1.169&r2=1.170)
pgsql/src/pl/plpgsql/src:
gram.y (r1.79 -> r1.80)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/gram.y.diff?r1=1.79&r2=1.80)