pgsql: For protocol-level prepare/bind/execute: o print user name for

Log Message:
-----------
For protocol-level prepare/bind/execute:

o print user name for all
o print portal name if defined for all
o print query for all
o reduce log_statement header to single keyword
o print bind parameters as DETAIL if text mode

Modified Files:
--------------
pgsql/doc/src/sgml:
config.sgml (r1.71 -> r1.72)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/config.sgml.diff?r1=1.71&r2=1.72)
pgsql/src/backend/commands:
portalcmds.c (r1.48 -> r1.49)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/portalcmds.c.diff?r1=1.48&r2=1.49)
prepare.c (r1.58 -> r1.59)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/prepare.c.diff?r1=1.58&r2=1.59)
pgsql/src/backend/executor:
spi.c (r1.152 -> r1.153)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/spi.c.diff?r1=1.152&r2=1.153)
pgsql/src/backend/tcop:
postgres.c (r1.495 -> r1.496)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/postgres.c.diff?r1=1.495&r2=1.496)
pgsql/src/backend/utils/mmgr:
portalmem.c (r1.90 -> r1.91)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mmgr/portalmem.c.diff?r1=1.90&r2=1.91)
pgsql/src/include/utils:
portal.h (r1.63 -> r1.64)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/portal.h.diff?r1=1.63&r2=1.64)