res_search() detection: always look for res_search to include -lresolv

	for inet_aton().  May be linked in when not absolutely necessary...
	but no big deal, we'll likely start using res_search over sychronous
	get{host,peer}byname calls anyways.
inet_aton() detection: use link instead of compile

build/openldap.m4

@@ -813,7 +813,7 @@ dnl ====================================================================
 dnl Define inet_aton is available
 AC_DEFUN(OL_FUNC_INET_ATON,
  [AC_CACHE_CHECK([for inet_aton()], ol_cv_func_inet_aton,
-    [AC_TRY_COMPILE([
+    [AC_TRY_LINK([
 #ifdef HAVE_SYS_TYPES_H
 #	include <sys/types.h>
 #endif

configure.in

@@ -654,32 +654,30 @@ fi
 dnl HP-UX requires -lV3
 AC_CHECK_LIB(V3, sigset)
 
+dnl Check for resolver routines
+AC_CHECK_FUNC(res_search,:)
+if test $ac_cv_func_res_search = no ; then 
+	AC_CHECK_LIB(bind, res_search)
+	ac_cv_func_res_search=$ac_cv_lib_bind_res_search
+fi
 
-# find res_search
-if test $ol_enable_dns != no ; then
-	dnl Check for resolver routines
-	AC_CHECK_FUNC(res_search,:)
-	if test $ac_cv_func_res_search = no ; then 
-		AC_CHECK_LIB(bind, res_search)
-		ac_cv_func_res_search=$ac_cv_lib_bind_res_search
-	fi
-	if test $ac_cv_func_res_search = no ; then 
-		AC_CHECK_LIB(bind, __res_search)
-		ac_cv_func_res_search=$ac_cv_lib_bind___res_search
-	fi
-	if test $ac_cv_func_res_search = no ; then 
-		AC_CHECK_LIB(resolv, res_search)
-		ac_cv_func_res_search=$ac_cv_lib_resolv_res_search
-	fi
+if test $ac_cv_func_res_search = no ; then 
+	AC_CHECK_LIB(bind, __res_search)
+	ac_cv_func_res_search=$ac_cv_lib_bind___res_search
+fi
 
-	if test "$ac_cv_func_res_search" = yes ; then
-		AC_DEFINE(HAVE_RES_SEARCH,1,
-			[define if you have res_search()])
-	elif test $ol_enable_dns = yes ; then
-		AC_MSG_ERROR([--enable-dns requires res_search])
-	else
-		AC_MSG_WARN([no res_search, disabling DNS support])
-	fi
+if test $ac_cv_func_res_search = no ; then 
+	AC_CHECK_LIB(resolv, res_search)
+	ac_cv_func_res_search=$ac_cv_lib_resolv_res_search
+fi
+
+if test "$ac_cv_func_res_search" = yes ; then
+	AC_DEFINE(HAVE_RES_SEARCH,1,
+		[define if you have res_search()])
+elif test $ol_enable_dns = yes ; then
+	AC_MSG_ERROR([--enable-dns requires res_search])
+elif test $ol_enable_dns != no ; then
+	AC_MSG_WARN([no res_search, disabling DNS support])
 fi