add radware_appdirector_enum

This module scans for Radware AppDirector's web login portal, and performs login brute force to identify valid credentials.

- mstidy.tb & retab.rb run done
- stop_on_success is set to true. Important, otherwise the app starts dropping bf source.
- slowing down brute force speed seems to work though, but can take a long time if more creds to check &| more targets
- better to run bf with 2-3 creds against range, & then come back with more creds if needed
changed default options

Updated these default options to false:
      'DB_ALL_CREDS'    => false
      'BLANK_PASSWORDS' => false
Updated code

msftidy compliant now. Have run it thru retab.rb, hence the indent like this.
Added ext .rb

... ext .rb why you no save.
Updated code
Merge for retab
Retab changes for PR #2455
Use the peer method
Delete some white lines
Land #2455, @juushya's aux module for radware