libzmq/builds/valgrind/valgrind.supp

{
   <socketcall_sendto>
   Memcheck:Param
   socketcall.sendto(msg)
   fun:send
   ...
}
{
   <socketcall_sendto>
   Memcheck:Param
   socketcall.send(msg)
   fun:send
   ...
}
{
   <glibc_freeres>
   Memcheck:Free
   fun:free
   ...
   fun:__libc_freeres
   ...
}