Added Get-MSSQLLinkPasswords to PostExploitation.psm1

[arantasa]

Get-MSSQLLinkPasswords extracts and decrypts the connection credentials for all linked servers that use SQL Server authentication on all local MSSQL instances.

[darkoperator]

• Can you format it:

<#
      Help comment block
#>
function Get-...

• Since it is Post can it output a base64 encoded or compress string and it self as script for use thru shells?
• How would it handle a host that does not have MSSQL installed?

Sorry for the style changes, working a style guide for all my modules at the moment