Add a patch that sends a probe packet to the server when setting up the

client socket.  It helps in a few cases where the server has multiple
addresses, only some of them are reachable, and connect() succeeds even
though sendto() will fail.

Approved by:	maintainer

net-mgmt/collectd5/Makefile

@@ -3,6 +3,7 @@
 
 PORTNAME=	collectd
 PORTVERSION=	5.8.0
+PORTREVISION=	1
 CATEGORIES=	net-mgmt
 MASTER_SITES=	https://storage.googleapis.com/collectd-tarballs/
 PKGNAMESUFFIX=	5

net-mgmt/collectd5/files/patch-src_libcollectdclient_network.c

@@ -0,0 +1,16 @@
+--- src/libcollectdclient/network.c.orig
++++ src/libcollectdclient/network.c
+@@ -174,6 +174,13 @@
+       continue;
+     }
+ 
++    status = sendto(srv->fd, "", 1, 0, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
++    if (status != 1) {
++      close(srv->fd);
++      srv->fd = -1;
++      continue;
++    }
++
+     srv->sa = malloc(ai_ptr->ai_addrlen);
+     if (srv->sa == NULL) {
+       close(srv->fd);

net-mgmt/collectd5/files/patch-src_network.c

@@ -0,0 +1,16 @@
+--- src/network.c.orig
++++ src/network.c
+@@ -2000,6 +2000,13 @@
+       continue;
+     }
+ 
++    status = sendto(client->fd, "", 1, 0, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
++    if (status != 1) {
++      close(client->fd);
++      client->fd = -1;
++      continue;
++    }
++
+     client->addr = calloc(1, sizeof(*client->addr));
+     if (client->addr == NULL) {
+       ERROR("network plugin: calloc failed.");