Using Collection instead of GlobalCollection

Both has the same methods and characteristics except for the fact that
one is global and the other not. That can be handled by the backend.

src/modsecurity.cc

@@ -18,6 +18,7 @@
 
 #include "modsecurity/modsecurity.h"
 #include "modsecurity/rule.h"
+#include "src/collection/backend/in_memory-per_process.h"
 #include "src/config.h"
 #include "src/unique_id.h"
 #ifdef MSC_WITH_CURL
@@ -45,6 +46,8 @@ namespace modsecurity {
  */
 ModSecurity::ModSecurity()
     : m_connector(""),
+    m_global_collection(new collection::backend::InMemoryPerProcess()),
+    m_ip_collection(new collection::backend::InMemoryPerProcess()),
     m_logCb(NULL) {
     UniqueId::uniqueId();
     srand(time(NULL));