Fix bug in delayed connection handling

src/common/memcached.c

@@ -295,6 +295,7 @@ static void memcached_connect(liMemcachedCon *con) {
 			case EINPROGRESS:
 			case EALREADY:
 			case EINTR:
+			case EISCONN:
 				memcached_start_io(con);
 				li_ev_io_add_events(con->loop, &con->con_watcher, EV_READ | EV_WRITE);
 				break;

src/modules/mod_fastcgi.c

@@ -683,6 +683,7 @@ static liHandlerResult fastcgi_statemachine(liVRequest *vr, fastcgi_connection *
 			case EINPROGRESS:
 			case EALREADY:
 			case EINTR:
+			case EISCONN:
 				fcon->state = FS_CONNECTING;
 				return LI_HANDLER_GO_ON;
 			case EAGAIN: /* backend overloaded */

src/modules/mod_proxy.c

@@ -330,6 +330,7 @@ static liHandlerResult proxy_statemachine(liVRequest *vr, proxy_connection *pcon
 			case EINPROGRESS:
 			case EALREADY:
 			case EINTR:
+			case EISCONN:
 				pcon->state = SS_CONNECTING;
 				return LI_HANDLER_GO_ON;
 			case EAGAIN: /* backend overloaded */

src/modules/mod_scgi.c

@@ -436,6 +436,7 @@ static liHandlerResult scgi_statemachine(liVRequest *vr, scgi_connection *scon)
 			case EINPROGRESS:
 			case EALREADY:
 			case EINTR:
+			case EISCONN:
 				scon->state = SS_CONNECTING;
 				return LI_HANDLER_GO_ON;
 			case EAGAIN: /* backend overloaded */