pgsql: Add -L option to psql to log sessions.

Log Message:
-----------
Add -L option to psql to log sessions.

Lorne Sunley

Modified Files:
--------------
pgsql/doc/src/sgml/ref:
psql-ref.sgml (r1.144 -> r1.145)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/psql-ref.sgml.diff?r1=1.144&r2=1.145)
pgsql/src/bin/psql:
common.c (r1.101 -> r1.102)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/common.c.diff?r1=1.101&r2=1.102)
describe.c (r1.115 -> r1.116)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/describe.c.diff?r1=1.115&r2=1.116)
help.c (r1.101 -> r1.102)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/help.c.diff?r1=1.101&r2=1.102)
large_obj.c (r1.36 -> r1.37)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/large_obj.c.diff?r1=1.36&r2=1.37)
print.c (r1.58 -> r1.59)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/print.c.diff?r1=1.58&r2=1.59)
print.h (r1.24 -> r1.25)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/print.h.diff?r1=1.24&r2=1.25)
settings.h (r1.24 -> r1.25)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/settings.h.diff?r1=1.24&r2=1.25)
startup.c (r1.116 -> r1.117)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/startup.c.diff?r1=1.116&r2=1.117)
pgsql/src/bin/scripts:
createlang.c (r1.15 -> r1.16)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/createlang.c.diff?r1=1.15&r2=1.16)
droplang.c (r1.14 -> r1.15)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/droplang.c.diff?r1=1.14&r2=1.15)