plproxy - plproxy: move poll compat func to .c file, make fd_set runtime

Log Message:
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move poll compat func to .c file, make fd_set runtime resizeable

Modified Files:
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plproxy:
Makefile (r1.18 -> r1.19)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/Makefile.diff?r1=1.18&r2=1.19)
plproxy/src:
poll_compat.h (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/src/poll_compat.h.diff?r1=1.2&r2=1.3)

Added Files:
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plproxy/src:
poll_compat.c (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/src/poll_compat.c?rev=1.1&content-type=text/x-cvsweb-markup)