minor usability enhancement regarding warning for --text-only switch

lib/core/option.py

@@ -1341,6 +1341,7 @@ def __setKnowledgeBaseAttributes(flushAll=True):
     kb.dep = None
     kb.docRoot = None
     kb.dynamicMarkings = []
+    kb.dynamicParameters = False
     kb.endDetection = False
     kb.httpErrorCodes = {}
     kb.errorIsNone = True

lib/core/settings.py

@@ -339,3 +339,6 @@ LOCALHOST = "127.0.0.1"
 
 # Default ports used in Tor proxy bundles
 DEFAULT_TOR_PORTS = (8118, 8123)
+
+# Percentage below which comparison engine could have problems
+LOW_TEXT_PERCENT = 20