9852 enable ld(1) guidance and deflib assertions for the illumos build

@@ -44,16 +44,11 @@
 LDLIBS +=       -lofmt -linetutil -lipadm -lnvpair
 LINTFLAGS +=    -m
 
 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
+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)