Fixes #3915 - NoMethodError private method `rhost'

There's no self.rhost, but rhost is defined
Land #3918, bugfix on self.rhost mssql_login
Fixes #3876 - Move pxeexploit to local directory
Remove modules/exploits/linux/http/dlink_upnp_exec_noauth_telnetd.rb

Time is up, so good bye.
Remove auxiliary/scanner/elasticsearch/indeces_enum.rb

Time is up, so good bye.
Land #3925, rm indeces_enum

Deprecated.
Land #3924, rm dlink_upnp_exec_noauth_telnetd

Deprecated.
Land #3923, mv misc/pxexploit to local/pxeexploit

Also renamed typo'd pxexploit -> pxeexploit.