illumos gate

Build errors with gcc compilers:

    conditions.c: In function 'nwamd_check_conditions':
    conditions.c:733:62: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]
      733 |  if (activation_mode == NWAM_ACTIVATION_MODE_CONDITIONAL_ANY && ret)
          |                                                              ^~
    cc1: all warnings being treated as errors

    ncu_ip.c: In function 'nwamd_get_dhcpinfo_data':
    ncu_ip.c:217:2: error: 'request' may be used uninitialized in this function [-Werror=maybe-uninitialized]
      217 |  free(request);
          |  ^~~~~~~~~~~~~
    ncu_ip.c: In function 'nwamd_ncu_handle_if_state_event':
    ncu_ip.c:1153:8: error: 'static_addr' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     1153 |    if (!static_addr && family == AF_INET) {
          |        ^~~~~~~~~~~~
    cc1: all warnings being treated as errors

    ncu_ip.c:1095:50: error: 'stateless_running' may be used uninitialized in this function [-Werror=maybe-uninitialized]
        } else if (u_if->nwamd_if_stateless_requested &&
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
            stateless_running) {
            ~~~~~~~~~~~~~~~~~
    ncu_ip.c:1092:49: error: 'v6dhcp_running' may be used uninitialized in this function [-Werror=maybe-uninitialized]
        } else if (u_if->nwamd_if_stateful_requested &&
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
            v6dhcp_running) {
            ~~~~~~~~~~~~~~
    ncu_ip.c:1090:38: error: 'v4dhcp_running' may be used uninitialized in this function [-Werror=maybe-uninitialized]
        if (u_if->nwamd_if_dhcp_requested && v4dhcp_running) {
            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
    cc1: all warnings being treated as errors
    *** Error code 1
    dmake: Fatal error: Command failed for target `ncu_ip.o'
    Current working directory /code/illumos-gate/usr/src/cmd/cmd-inet/lib/nwamd

Testing done: build/install/boot, my OI test systems with nwam appear to behave as expected.