5166 sendmail package should be replaceable

@@ -1898,5 +1898,9 @@
 depend fmri=system/data/terminfo type=require
 #
 # Depend on zoneinfo data.
 #
 depend fmri=system/data/zoneinfo type=require
+#
+# The mailx binary calls sendmail
+#
+depend fmri=system/network/mailwrapper type=require