Adds Cisco SSl VPN Privilege Escalation exploit
Remove dead code
Reformat and #include? changes
Use vars_get for params
Change to verbose output
Add logout page verification
Remove MetaSSH requirements
Move Cisco ASA SSL VPN Esc to Aux
Make retries configurable
Clean up aux check review comments
Make msftidy happy
Fix null arguments syntax
Switch to vprint_good for verbose good things
Bring options over from reverse_tcp (bind address, etc).

Also includes the SSLCert => HandlerSSLCert change
Change SSLCert to HandlerSSLCert to avoid conflicts with modules
Make it clear SSLVersion is not advertised since it isn't used
Protecting it once seems like enough (typo)
Update from upstream master
Do minor cleanup
Delete ssh_socket attribute