12312 fix unused lib dependencies

*** 20,30 ****
  #
  #
  # Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
! #
  
  PROG =          ipadm
  ROOTFS_PROG =   $(PROG)
  LOCALOBJS=      ipadm.o
  COMMONOBJS=
--- 20,30 ----
  #
  #
  # Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
! # Copyright 2020 Joyent, Inc.
  
  PROG =          ipadm
  ROOTFS_PROG =   $(PROG)
  LOCALOBJS=      ipadm.o
  COMMONOBJS=
*** 44,57 ****
  
  ROOTUSRSBINLINKS = $(PROG:%=$(ROOTUSRSBIN)/%)
  
  # ipadm uses the ancillary data feature which is available only through
  # UNIX 98 standards version of Socket interface. This interface is supposed to
! # be accessed by -lxnet. In addition -lsocket is used to capture new
! # not-yet-standard interfaces. Someday -lxnet alone should be enough when IPv6
! # inspired new interfaces are part of standards.
! LDLIBS +=       -lxnet -lsocket
  
  # these #defines are required to use UNIX 98 interfaces
  _D_UNIX98_EXTN= -D_XOPEN_SOURCE=500 -D__EXTENSIONS__
  
  $(OBJS)         := CPPFLAGS +=  $(_D_UNIX98_EXTN)
--- 44,55 ----
  
  ROOTUSRSBINLINKS = $(PROG:%=$(ROOTUSRSBIN)/%)
  
  # ipadm uses the ancillary data feature which is available only through
  # UNIX 98 standards version of Socket interface. This interface is supposed to
! # be accessed by -lxnet.
! LDLIBS +=       -lxnet
  
  # these #defines are required to use UNIX 98 interfaces
  _D_UNIX98_EXTN= -D_XOPEN_SOURCE=500 -D__EXTENSIONS__
  
  $(OBJS)         := CPPFLAGS +=  $(_D_UNIX98_EXTN)