added LSL2 stored procedures

LSL2/STPROC/SRP_VALIDATE_USER.txt

@@ -0,0 +1,10 @@
+Compile function SRP_Validate_User(Username, Password, Domain)
+
+If Assigned(Username) else Username = ""
+If Assigned(Password) else Password = ""
+If Assigned(Domain) else Domain = ""
+Debug
+Declare function SRPLogonAPI_ValidateUser
+Result = SRPLogonAPI_ValidateUser(Username, Password, Domain)
+
+Return Result