Valgrind fixes

test/README.md

@@ -98,6 +98,8 @@ The `mem.sh` runs memory checks using valgrind. Start it with no arguments to te
   mem.sh restconf backend           # Only backend and cli
 ```
 
+Valgrind uses a suppression file `valgrind-clixon.supp` to filter dlopen functions
+
 ## Run pattern of tests
 
 The above scripts work with the `pattern` variable to limit the scope of which tests run, eg:

test/valgrind-clixon.supp

@@ -29,6 +29,13 @@
    fun:*
    fun:_dl_check_map_versions
 }
+{
+   supp4.1
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:*
+   fun:_dl_check_map_versions
+}
 {
    supp5
    Memcheck:Leak