Adds a notification when initially entering a SQL shell within SQL session types

[cgranleese-r7]

This PR adds a notification when a user enters a SQL shell within SQL session types via the query_interactive command.

The aim was to offer some basic information to the users upon entering the shell.

Verification

• Start msfconsole
• Ensure you have the features set for the new session types - features set <session type> true
• Get a session for Meterpreter, MySQL, MSSQL, PostgreSQL and SMB - mysql_login, mssql_login, postgres_login and smb_login
• Verify the notification appears when entering each of the new session types
• Verify code changes are sane

[adfoster-r7]

Looks like this shadows the existing prompt method:

>> framework.sessions[1].console.method(:prompt)
=> #<Method: Rex::Post::PostgreSQL::Ui::Console(Rex::Ui::Text::Shell)#prompt() /Users/user/Documents/code/metasploit-framework/lib/rex/ui/text/shell.rb:290>

It looks like since you're not re-using this prompt method in more than one place, it would be good to revert - otherwise existing code that want to call the expected prompt method implementation will explode

[cgranleese-r7]

Whoops I had meant to add it above as well. I can just remove it and handle both instances with

#{session.type} @ #{client.peerinfo} (#{current_database}

If that works for you?

[adfoster-r7]

Sounds good; just remember to rename the method to something that doesn't currently exist already 👍

[adfoster-r7]

Release Notes

Adds additional help information when interacting with a SQL session