pgbouncer - pgbouncer: move shutdown after fork(), detect old bouncer

Log Message:
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move shutdown after fork(), detect old bouncer

Modified Files:
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pgbouncer/include:
takeover.h (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/include/takeover.h.diff?r1=1.2&r2=1.3)
pgbouncer/src:
main.c (r1.29 -> r1.30)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/main.c.diff?r1=1.29&r2=1.30)
server.c (r1.21 -> r1.22)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/server.c.diff?r1=1.21&r2=1.22)
takeover.c (r1.10 -> r1.11)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/takeover.c.diff?r1=1.10&r2=1.11)