Snippets for open-iscsi 2.1.10 from Alpine s390x

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-s390x/main/open-iscsi/open-iscsi-2.1.10-r4.log.

../iscsiuio/src/unix/iscsid_ipc.c:274:29: warning: the comparison will always evaluate as 'true' for the address of '__s6_addr' will never be NULL [-Waddress]
  274 |                         if (!ird->ipv6_subnet_mask.s6_addr)
      |                             ^

../iscsiuio/src/uip/uip-neighbor.c:197:51: warning: taking address of packed member of 'struct uip_ipv6_hdr' may result in an unaligned pointer value [-Waddress-of-packed-member]
  197 |         e = find_entry(ustack, (struct in6_addr *)ipv6_hdr->destipaddr);
      |                                                   ^~~~~~~~

../iscsiuio/src/uip/uip_arp.c:219:34: warning: taking address of packed member of 'struct ip_hdr' may result in an unaligned pointer value [-Waddress-of-packed-member]
  219 |                 uip_arp_update(ip->srcipaddr, &eth->src);
      |                                ~~^~~~~~~~~~~

../iscsiuio/src/uip/uip_arp.c:247:43: warning: taking address of packed member of 'struct arp_hdr' may result in an unaligned pointer value [-Waddress-of-packed-member]
  247 |                         uip_arp_update(arp->sipaddr, &arp->shwaddr);
      |                                        ~~~^~~~~~~~~

../iscsiuio/src/uip/uip_arp.c:273:35: warning: taking address of packed member of 'struct arp_hdr' may result in an unaligned pointer value [-Waddress-of-packed-member]
  273 |                 uip_arp_update(arp->sipaddr, &arp->shwaddr);
      |                                ~~~^~~~~~~~~

../usr/iscsiadm.c:819:39: warning: passing argument 1 of 'iscsi_addr_match' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
  819 |                     (iscsi_addr_match(address,
      |                                       ^~~~~~~

../usr/iscsiadm.c:820:39: warning: passing argument 2 of 'iscsi_addr_match' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
  820 |                                       iscsi_node_conn_address_get(node)) != 1))
      |                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

../usr/iscsiadm.c:795:14: warning: unused variable 'match' [-Wunused-variable]
  795 |         bool match = false;
      |              ^~~~~