Avoid to check for existence of not needed UDFs and minor code adjustment for cleanup() method

plugins/dbms/mysql.py

@@ -560,6 +560,7 @@ class MySQLMap(Fingerprint, Enumeration, Filesystem, Miscellaneous, Takeover):
             self.udfLocalFile   += "/mysql/linux/lib_mysqludf_sys.so"
             self.udfSharedLibExt = "so"
 
+        self.checkNeededUdfs()
         self.udfInjectCore(self.sysUdfs)
         
     def uncPathRequest(self):

plugins/dbms/postgresql.py

@@ -469,6 +469,7 @@ class PostgreSQLMap(Fingerprint, Enumeration, Filesystem, Miscellaneous, Takeove
             self.udfLocalFile += "/postgresql/linux/%s/lib_postgresqludf_sys.so" % majorVer
             self.udfSharedLibExt = "so"
 
+        self.checkNeededUdfs()
         self.udfInjectCore(self.sysUdfs)
 
     def uncPathRequest(self):

plugins/generic/takeover.py

@@ -100,6 +100,9 @@ class Takeover(Abstraction, Metasploit, Registry):
         if not web or (web and self.webBackdoorUrl is not None):
             self.runCmd(conf.osCmd)
 
+        if not conf.osShell and not conf.osPwn and not conf.cleanup:
+            self.cleanup()
+
     def osShell(self):
         stackedTest()
 
@@ -120,6 +123,9 @@ class Takeover(Abstraction, Metasploit, Registry):
         if not web or (web and self.webBackdoorUrl is not None):
             self.shell()
 
+        if not conf.osPwn and not conf.cleanup:
+            self.cleanup()
+
     def osPwn(self):
         goUdf = False
 
@@ -228,6 +234,9 @@ class Takeover(Abstraction, Metasploit, Registry):
         if not web or (web and self.webBackdoorUrl is not None):
             self.pwn(goUdf)
 
+        if not conf.cleanup:
+            self.cleanup()
+
     def osSmb(self):
         stackedTest()