Deprecate Socket.send in favor of Socket.print

Users may confuse the send method (which is just a Str-friendly wrapper
over write) with send(2), which is subtly different from write(2).  To
avoid this confusion, and open up the possibility of a true send(2)
analogue in the future, I think that the current send should be renamed
to print (thanks to jnthn++ for the suggestion)

src/core/IO/Socket.pm

@@ -66,7 +66,12 @@ my role IO::Socket does IO {
         die 'Socket.poll is NYI'
     }
 
-    method send (Str(Cool) $string) {
+    method send(|c) {
+        DEPRECATED('print', |<2015.07 2015.09>);
+        self.print(|c)
+    }
+
+    method print (Str(Cool) $string) {
         fail("Not connected") unless $!PIO;
         nqp::printfh($!PIO, nqp::unbox_s($string));
         True