Adds comments for login function

Author: msutovsky-r7

lib/msf/core/exploit/remote/http/sitecore_xp.rb

@@ -10,7 +10,10 @@ def initialize(info = {})
             super
             register_options([OptString.new('IDENTITY_VHOST', [true, 'Hostname of Sitecore identity server']) ])
           end
-
+          
+          #
+          # Identifies against identity server. The Sitecore XP uses separate vhost to authenticate and gain session cookies.
+          #
           def login_identitysrv(username, password)
             res = send_request_cgi({
               'uri' => normalize_uri(target_uri.path, 'Account', 'Login'),
@@ -98,7 +101,7 @@ def get_identity_cookies
 
             res&.code == 302 && res.headers.fetch('Location', nil)&.include?('sitecore/admin')
           end
-
+        
           def get_version
             res = send_request_cgi({
               'uri' => normalize_uri('sitecore', 'shell', 'sitecore.version.xml'),