pgsql: Add psql '\pset format wrapped' mode to wrap output to screen

Log Message:
-----------
Add psql '\pset format wrapped' mode to wrap output to screen width, or
file/pipe output too if \pset columns' is set.

Bryce Nesbitt

Modified Files:
--------------
pgsql/doc/src/sgml/ref:
psql-ref.sgml (r1.202 -> r1.203)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/psql-ref.sgml?r1=1.202&r2=1.203)
pgsql/src/bin/psql:
command.c (r1.187 -> r1.188)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/command.c?r1=1.187&r2=1.188)
mbprint.c (r1.30 -> r1.31)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/mbprint.c?r1=1.30&r2=1.31)
print.c (r1.97 -> r1.98)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/print.c?r1=1.97&r2=1.98)
print.h (r1.35 -> r1.36)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/print.h?r1=1.35&r2=1.36)
startup.c (r1.146 -> r1.147)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/startup.c?r1=1.146&r2=1.147)