socket_mcleave4 - leave a multicast group

       socket_mcleave4 leaves the IPv4 multicast group groupip.

       If something goes wrong, socket_mcleave4 returns -1, setting errno appropriately.

       socket_mcleave4 - leave a multicast group

socket_mcjoin4(3), socket_mcleave6(3), socket_getifidx(3)

                                                                                              socket_mcleave4(3)

#include<libowfat/socket.h>

       int socket_mcleave4(int s, const char groupip[4]);