Fixes SSL support for http_login (variable shadowing)

Author: HD Moore

lib/metasploit/framework/login_scanner/http.rb

@@ -193,7 +193,6 @@ def check_setup
         #   login with.
         # @return [Result] A Result object indicating success or failure
         def attempt_login(credential)
-          ssl = false if ssl.nil?
 
           result_opts = {
             credential: credential,
@@ -314,6 +313,10 @@ def set_sane_defaults
             self.ssl = true
           end
 
+          if self.ssl.nil?
+            self.ssl = false
+          end
+
           nil
         end