illumos gate

One of the differences that holds up porting software from Linux to illumos is that code that uses epoll must be reworked to use event ports. For both these applications and for lx-branded zones, we should add support for epoll to poll(7D). At the same time, we should change the language in the poll(7D) man page to note that the interface is not, in fact, going to "be removed in a future Solaris release."