pgbouncer - pgbouncer: Let disconnect_server/client() take printf style

Log Message:
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Let disconnect_server/client() take printf style args.

Modified Files:
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pgbouncer/include:
objects.h (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/include/objects.h?r1=1.8&r2=1.9)
pgbouncer/src:
janitor.c (r1.40 -> r1.41)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/janitor.c?r1=1.40&r2=1.41)
objects.c (r1.56 -> r1.57)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/objects.c?r1=1.56&r2=1.57)
server.c (r1.32 -> r1.33)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/server.c?r1=1.32&r2=1.33)