Added new switch --union-char to be able to provide the character used in union-test and exploit (default is still NULL, but can be any)

lib/core/agent.py

@@ -425,7 +425,7 @@ class Agent:
 
         return concatenatedQuery
 
-    def forgeInbandQuery(self, query, exprPosition=None, nullChar="NULL", count=None, comment=None):
+    def forgeInbandQuery(self, query, exprPosition=None, nullChar=None, count=None, comment=None):
         """
         Take in input an query (pseudo query) string and return its
         processed UNION ALL SELECT query.
@@ -456,6 +456,9 @@ class Agent:
         @rtype: C{str}
         """
 
+        if nullChar is None:
+            nullChar = conf.uChar
+
         if count is None:
             count = kb.unionCount