Remove setsockopt for SIGPIPE; disable SIGPIPE via signal() on non-WIN32

plugins/obs-outputs/librtmp/rtmp.c

@@ -1220,8 +1220,6 @@ RTMP_Connect0(RTMP *r, struct sockaddr * service)
         }
     }
 
-    setsockopt(r->m_sb.sb_socket, SOL_SOCKET, SO_NOSIGPIPE, (char *) &on, sizeof(on));
-
     if(!r->m_bUseNagle)
         setsockopt(r->m_sb.sb_socket, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on));