pgsql: Add #include <sys/time.h> for struct timeval definition on

Log Message:
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Add #include <sys/time.h> for struct timeval definition on BSD/OS.

Modified Files:
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pgsql/src/backend/replication/walreceiver:
walreceiver.c (r1.1 -> r1.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/replication/walreceiver/walreceiver.c?r1=1.1&amp;r2=1.2)