Auto merge of #2042 - pfmooney:illumos-portnotify, r=JohnTitor

Add port_notify struct for illumos and Solaris

This adds a missing struct for configuring event ports notifications.  The `libc-test` suite passes on illumos (OmniOSCE) and is assumed to pass on Solaris, given that the interface has been present since Oracle forked from OpenSolaris.

Author: bors

src/unix/solarish/mod.rs

@@ -370,6 +370,11 @@ s! {
         pub portev_user: *mut ::c_void,
     }
 
+    pub struct port_notify {
+        pub portnfy_port: ::c_int,
+        pub portnfy_user: *mut ::c_void,
+    }
+
     pub struct exit_status {
         e_termination: ::c_short,
         e_exit: ::c_short,