closes #219 - unhidden switch --technique and adapted code accordingly (renamed conf.technique to conf.tech to fit properly in the -h help message)

sqlmap.conf

@@ -223,6 +223,18 @@ textOnly = False
 # techniques.
 [Techniques]
 
+# SQL injection techniques to test for.
+# Valid: an integer composed by 1, 2, 3, 4 or 5 where:
+# 1: boolean-based blind SQL injection
+# 2: error-based SQL injection
+# 3: UNION query SQL injection
+# 4: stacked queries SQL injection
+# 5: time-based blind SQL injection
+# Example: 24 (means test for error-based and stacked queries SQL
+# injection types only)
+# Default: 0 (means test for all SQL injection types - recommended)
+tech = 0
+
 # Seconds to delay the response from the DBMS.
 # Valid: integer
 # Default: 5