pgsql: Adjust probe for getaddrinfo to cope with macro-ized definitions,

Log Message:
-----------
Adjust probe for getaddrinfo to cope with macro-ized definitions, such
as Tru64's. Per previous discussion.

Tags:
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REL8_1_STABLE

Modified Files:
--------------
pgsql:
configure (r1.461.2.8 -> r1.461.2.9)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.461.2.8&r2=1.461.2.9)
configure.in (r1.431.2.8 -> r1.431.2.9)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.431.2.8&r2=1.431.2.9)
pgsql/src/include:
pg_config.h.in (r1.87.2.2 -> r1.87.2.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.in.diff?r1=1.87.2.2&r2=1.87.2.3)