pgbouncer - pgbouncer: error checks for all libevent calls try to

Log Message:
-----------
error checks for all libevent calls

try to survive errors delicately, by dropping connection where possible.

Thats not yet possible for event_del() and evtimer_add(), exit immidiately then.

Modified Files:
--------------
    pgbouncer/include:
        sbuf.h (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/include/sbuf.h.diff?r1=1.4&r2=1.5)
    pgbouncer/src:
        janitor.c (r1.17 -> r1.18)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/janitor.c.diff?r1=1.17&r2=1.18)
        main.c (r1.24 -> r1.25)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/main.c.diff?r1=1.24&r2=1.25)
        objects.c (r1.33 -> r1.34)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/objects.c.diff?r1=1.33&r2=1.34)
        pktbuf.c (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/pktbuf.c.diff?r1=1.4&r2=1.5)
        pooler.c (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/pooler.c.diff?r1=1.6&r2=1.7)
        sbuf.c (r1.19 -> r1.20)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/sbuf.c.diff?r1=1.19&r2=1.20)
        stats.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/stats.c.diff?r1=1.3&r2=1.4)
        takeover.c (r1.8 -> r1.9)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/takeover.c.diff?r1=1.8&r2=1.9)