Added support to directly connect also to Microsoft SQL Server database.

Fixed direct connection to always use the same query as of UNION query SQL injection (= one query with multiple columns/entries output).
Minor fixes to Firebird/Access/SQLite connectors to use connector's execute()/fetchall() as wrapper for third-party libraries' methods.
Forced conf.timeout to 10 seconds when directly connecting to database.
Slightly improved regular expression to parse -d parameter.
Added import check for all connectors' third-party libraries.
Code refactoring:
* Moved conf.direct request to direct() function in lib/request/direct.py (code reused where needed).
* Back-delegated to generic connector close() and other methods.

plugins/dbms/mysql/fingerprint.py

@@ -154,9 +154,6 @@ class Fingerprint(GenericFingerprint):
         * http://dev.mysql.com/doc/refman/6.0/en/news-6-0-x.html (manual has been withdrawn)
         """
 
-        infoMsg = "testing MySQL"
-        logger.info(infoMsg)
-
         if conf.dbms in MYSQL_ALIASES and kb.dbmsVersion and kb.dbmsVersion[0].isdigit():
             setDbms("MySQL %s" % kb.dbmsVersion[0])
 
@@ -168,6 +165,9 @@ class Fingerprint(GenericFingerprint):
             if not conf.extensiveFp:
                 return True
 
+        infoMsg = "testing MySQL"
+        logger.info(infoMsg)
+
         randInt = str(randomInt(1))
         payload = agent.fullPayload(" AND CONNECTION_ID()=CONNECTION_ID()")
         result  = Request.queryPage(payload)