* When forwarding a message, replacing an attachment might make Alpine

     re-attach the original attachment. Reported by Michael Traxler. The
     solution was that as soon as we recognize that the attachment has
     changed we delete its id, since Alpine recognizes an old attachment
     by the existence of an id field in the attachment structure.

1 files changed, 102 insertions, 0 deletions

diff --git a/doc/tech-notes/tech-notes.txt b/doc/tech-notes/tech-notes.txt
index f9702f52..9f4ff4d1 100644
--- a/doc/tech-notes/tech-notes.txt
+++ b/doc/tech-notes/tech-notes.txt
@@ -1,4 +1,106 @@
 
+                             Alpine Technical Notes
+
+   Version 2.24, October 2020
+
+Table of Contents
+
+  Introduction
+
+     * Design Goals
+     * Alpine Components
+
+  Background Details
+
+     * Domain Names
+     * RFC 2822 Compliance
+     * SMTP and Sendmail
+     * Internet Message Access Protocol (IMAP)
+     * Multipurpose Internet Mail Extensions (MIME)
+     * Folder Collections
+
+  Building and Installation
+
+     * Compile-time Options
+     * Including LDAP Functionality
+     * Including Kerberos 5 Functionality
+     * Other Alpine Compile-time Options
+     * IMAPd Compile-time Options
+     * Building the Alpine Programs
+     * Installing Alpine and Pico on UNIX Platforms
+     * Installing PC-Alpine
+     * Installing IMAPd
+     * Support Files and Environment Variables: UNIX Alpine
+     * Support Files, Environment Variables, and Registry Values:
+       PC-Alpine
+
+  Command Line Arguments
+
+     * Alpine
+     * Pico
+     * Pilot
+
+  Configuration and Preferences
+
+     * Alpine Configuration
+     * General Configuration Variables
+     * Configuration Features
+     * Hidden Config Variables and Features
+     * Retired Variables
+     * Tokens for Index and Replying
+     * Conditional Inclusion of Text for Reply-Leadin, Signatures, and
+       Templates
+     * Per Server Directory Configuration
+     * Color Configuration
+     * Index Line Color Configuration
+     * Role Configuration
+     * Filtering Configuration
+     * Scoring Configuration
+     * Other Rules Configuration
+     * Search Rules Configuration
+     * Patterns
+     * Configuring News
+       Configuration Notes
+          + Alpine in Function Key Mode
+          + Domain Settings
+          + Syntax for Collections
+          + Syntax for Folder Names
+          + Server Name Syntax
+          + Folder Namespaces
+          + What is a Mail Drop?
+          + Sorting a Folder
+          + Alternate Editor
+          + Signatures and Signature Placement
+          + Feature List Variable
+          + Configuration Inheritance
+          + Using Environment Variables
+          + SMTP Servers
+          + MIME.Types file
+          + Color Details
+          + S/MIME Overview
+          + Additional Notes on PC-Alpine
+
+  Behind the Scenes
+
+     * Address Books
+     * Remote Configuration
+     * Checkpointing
+     * Debug Files
+     * INBOX and Special Folders
+     * Internal Help Files
+     * International Character Sets
+     * Interrupted and Postponed Messages
+     * Message Status
+     * MIME: Reading a Message
+     * MIME: Sending a Message
+     * New Mail Notification
+     * NFS
+     * Printers and Printing
+     * Save and Export
+     * Sent Mail
+     * Spell Checker
+     * Terminal Emulation and Key Mapping
+
                                   Introduction
 
 Design Goals