pgsql: Allow pg_ctl to determine the server is up when getting a request

Log Message:
-----------
Allow pg_ctl to determine the server is up when getting a request for a
password.

Make password error message a #define and use it consistently.

Sean Chittenden

Modified Files:
--------------
    pgsql/src/bin/pg_ctl:
        pg_ctl.c (r1.38 -> r1.39)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_ctl/pg_ctl.c.diff?r1=1.38&r2=1.39)
    pgsql/src/bin/pg_dump:
        pg_backup_db.c (r1.59 -> r1.60)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_db.c.diff?r1=1.59&r2=1.60)
        pg_dumpall.c (r1.53 -> r1.54)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_dumpall.c.diff?r1=1.53&r2=1.54)
    pgsql/src/bin/psql:
        command.c (r1.128 -> r1.129)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/command.c.diff?r1=1.128&r2=1.129)
        startup.c (r1.103 -> r1.104)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/startup.c.diff?r1=1.103&r2=1.104)
    pgsql/src/bin/scripts:
        common.c (r1.11 -> r1.12)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/scripts/common.c.diff?r1=1.11&r2=1.12)
    pgsql/src/interfaces/libpq:
        fe-auth.c (r1.93 -> r1.94)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-auth.c.diff?r1=1.93&r2=1.94)
        libpq-fe.h (r1.108 -> r1.109)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/libpq-fe.h.diff?r1=1.108&r2=1.109)