Try all addresses returned by getaddrinfo() until we find one that socket() is happy with

Someone reported being unable to connect with the error "Address family not
supported", which is probably being returned by socket().  It is likely a
system where getaddrinfo() is returning AF_INET6 addresses, but socket()
won't create AF_INET6 sockets.

To handle this case, we loop over all the addresses returned by getaddrinfo()
until we find one that socket() will accept.

Changelog

@@ -1,5 +1,8 @@
 [Changes 1.2.2]
 
+* If we can't create a socket for the first address returned by getaddrinfo(),
+  try the other returned addresses. (caf)
+
 * Only show version once with -v option (reported by cpet). (caf)
 
 * Drop group privileges before droppping user privileges when execing. (caf)