su: separated su_poll_port and su_epoll_port implementations.
Added a few test cases and fixed errors in su_port.c. darcs-hash:20070126184414-65a35-b3d2a1864afa68cf7511c6b02a1dfef4a89dcb0c.gz
Added a few test cases and fixed errors in su_port.c. darcs-hash:20070126184414-65a35-b3d2a1864afa68cf7511c6b02a1dfef4a89dcb0c.gz