Did some SP test style changes and added explanatory comments,

and removed a have_innodb.inc inclusion which was left by mistake
in an earlier change.

mysql-test/t/sp-threads.test

@@ -1,5 +1,6 @@
 #
-# Testing stored procedures with multiple connections
+# Testing stored procedures with multiple connections,
+# except security/privilege tests, they go to sp-security.test
 #
 
 connect (con1root,localhost,root,,);
@@ -52,3 +53,12 @@ connection con1root;
 drop table t1;
 drop procedure bug4934;
 
+
+#
+# BUG#NNNN: New bug synopsis
+#
+#--disable_warnings
+#drop procedure if exists bugNNNN;
+#--enable_warnings
+#create procedure bugNNNN...
+