Revert "When detaching a pipe, as well as checking the delay on connect sockopt…

Revert "When detaching a pipe, as well as checking the delay on connect sockopt is set, also ensure that the protocol is not pgm or epgm as we are not implementing the functionality for multicase types"

This reverts commit 5008f385.

src/session_base.cpp

@@ -408,8 +408,7 @@ void zmq::session_base_t::detached ()
 
     //  For delayed connect situations, terminate the pipe
     //  and reestablish later on
-    if (pipe && options.delay_attach_on_connect == 1
-        && addr->protocol != "pgm" && addr->protocol != "epgm") {
+    if (pipe && options.delay_attach_on_connect == 1) {
         pipe->terminate (false);
         socket->terminated (pipe);
         pipe = NULL;